The Right to Nationality in International Law

Introduction

The Right to Nationality is one of the basic legal guarantees of contemporary international law because it defines the formal bond between the individual and the State. That bond is not merely symbolic. It is the legal basis through which a person is usually recognized by public authorities and can claim protection, identity documents, civil status, residence, education, health care, family registration, political participation, and access to many other rights that are difficult to enjoy in practice without recognized membership in a State (Universal Declaration of Human Rights, 1948, art. 15; Edwards and Van Waas, 2014).

The centrality of nationality explains why statelessness remains a serious international legal problem. A stateless person is defined in the 1954 Convention as someone who is not considered a national by any State under the operation of its law (Convention relating to the Status of Stateless Persons, 1954, art. 1(1)). That definition is narrow and technical, but the harms associated with statelessness are wide. A person may be unable to register a birth, prove parentage, attend school, regularize residence, travel lawfully, work formally, inherit property, marry, or avoid prolonged detention because no State accepts legal responsibility for them or because the person cannot prove the nationality they may theoretically possess (Batchelor, 2006; Blitz and Lynch, 2011).

International law did not always treat this problem with the same intensity. For a long period, nationality was seen mainly as a matter within domestic jurisdiction. The traditional formula appears in the 1930 Hague Convention, which recognized that each State determines under its own law who its nationals are, while also making clear that such law must be consistent with international conventions, international custom, and generally recognized principles of law (Hague Convention on Certain Questions Relating to the Conflict of Nationality Laws, 1930, art. 1). The shift in the modern law of nationality lies precisely here: States still regulate nationality, but they no longer do so without legal limits.

Those limits became much stronger after 1945. Article 15 of the Universal Declaration of Human Rights established two propositions that continue to govern the subject: everyone has the right to a nationality, and no one shall be arbitrarily deprived of nationality or denied the right to change it (Universal Declaration of Human Rights, 1948, art. 15). Later treaties did not simply repeat that formula. They developed it in specific directions, especially through rules protecting children, prohibiting discrimination, limiting deprivation, and requiring safeguards against statelessness. The result is that the Right to Nationality now operates through a network of norms rather than through a single provision.

Children occupy a central place in that network. Article 24(3) of the International Covenant on Civil and Political Rights recognizes that every child has the right to acquire a nationality. Articles 7 and 8 of the Convention on the Rights of the Child connect nationality to birth registration, identity, and protection against unlawful interference with a child’s legal status (International Covenant on Civil and Political Rights, 1966, art. 24(3); Convention on the Rights of the Child, 1989, arts. 7–8). This is not accidental. International law gives particular weight to childhood statelessness because exclusion at birth can shape every later stage of legal life.

Gender equality is equally important. For much of modern legal history, nationality laws treated women as derivative members of the family and often prevented them from transmitting nationality to their children on equal terms with men. That structure produced statelessness across generations. Article 9 of the Convention on the Elimination of All Forms of Discrimination against Women directly addresses this by requiring equal rights for women to acquire, change, retain, and confer nationality (Convention on the Elimination of All Forms of Discrimination against Women, 1979, art. 9). The persistence of gender-discriminatory nationality laws in some States shows that statelessness is not only a technical defect in legislation. It is often the product of unequal membership rules.

The specialized conventions on statelessness give the field its basic institutional structure. The 1954 Convention is a protection instrument. It defines who is a stateless person and sets a framework for legal status and treatment. The 1961 Convention is a prevention and reduction instrument. It requires States to include safeguards in their nationality laws so that people, especially children, are not left without nationality at birth or stripped of it later in ways that create statelessness (Convention relating to the Status of Stateless Persons, 1954; Convention on the Reduction of Statelessness, 1961). The distinction matters because protection without reduction leaves the underlying problem unresolved, while prevention without procedures for identifying stateless persons leaves many people outside the legal system.

Regional law has also made major contributions. The American Convention on Human Rights expressly protects the right to nationality and prohibits arbitrary deprivation of it (American Convention on Human Rights, 1969, art. 20). The European Court of Human Rights, although operating without a general freestanding right to nationality in the European Convention, has addressed nationality disputes through private life, discrimination, and proportionality analysis in important cases such as Genovese v Malta and Kuric and Others v Slovenia (Genovese v Malta, 2011; Kuric and Others v Slovenia, 2012). African regional law has also been influential, particularly in linking nationality, birth registration, and the rights of the child (African Charter on the Rights and Welfare of the Child, 1990, art. 6). These developments show that the Right to Nationality is no longer interpreted solely through abstract sovereignty. It is increasingly assessed through human consequences and legal accountability.

At the same time, the subject cannot be reduced to formal treaty interpretation. Nationality disputes often arise through administrative practices rather than openly exclusionary statutes. A child may be entitled to nationality under domestic law but remain undocumented for years. A long-settled population may be erased from registers after state succession or constitutional change. A person accused of fraud or disloyalty may face deprivation of nationality without adequate notice, reasons, or review. In such cases, the legal issue is not only who is a national in theory, but who is recognized as one in practice. That gap between formal status and effective enjoyment is one of the main reasons why the field requires close doctrinal and institutional analysis (de Groot and Vink, 2014; Institute on Statelessness and Inclusion, 2021).

This article examines statelessness and the Right to Nationality as a structured field of public international law rather than as an isolated human rights topic. Its argument is that modern international law preserves State authority over nationality, but subjects that authority to increasingly dense limits grounded in human rights, equality, child protection, procedural fairness, and the prevention of statelessness. The analysis, therefore, proceeds on two levels at once. It studies the legal rules governing acquisition, loss, deprivation, proof, and restoration of nationality, and it also considers the concrete situations in which those rules determine whether a person lives inside or outside the protection of the law.

1. Concept and Legal Character

1.1 Nationality, citizenship and legal status

In public international law, nationality is best understood as the legal bond between a person and a State. It identifies the State that recognizes the person as one of its nationals and, by doing so, allocates a formal framework of rights, duties, and protection. Citizenship is often used as a synonym, especially in English-language instruments and commentary, but the two terms are not fully identical. Citizenship can also carry broader political and sociological meanings, such as participation, belonging, and democratic membership, while nationality performs a more technical function in international law as the status that connects the individual to a particular State (Nottebohm Case, 1955; Edwards and Van Waas, 2014).

That distinction matters because legal status is not exhausted by political membership. A person may live for decades in a country, speak its language, work there, and raise a family there, yet still lack nationality in law. Conversely, a person may formally possess a nationality but be unable to rely on it in practice because the State refuses recognition, denies documentation, or treats the status as legally irrelevant. For that reason, nationality must be analyzed not only as an abstract bond, but also as an enforceable legal position that can be proved, invoked, and defended before public authorities.

The treaty definition of statelessness is narrow and deliberately legal. Article 1(1) of the 1954 Convention defines a stateless person as someone “who is not considered as a national by any State under the operation of its law” (Convention relating to the Status of Stateless Persons, 1954, art. 1(1)). The crucial point is that the definition asks whether any State, applying its own law, recognizes the person as a national. It is not enough that the person has a social connection with a country, or that nationality might be morally deserved. The question is whether nationality exists in law and can be identified under the relevant legal systems (Convention relating to the Status of Stateless Persons, 1954, art. 1(1); UNHCR and IPU, 2005).

The same treaty framework also shows the limits of a purely formal approach. The 1954 Convention centers on de jure statelessness, but the older statelessness literature and later practice both acknowledge that some people fall outside Article 1(1) while facing materially similar exclusion. The attached UNHCR handbook explains that a person may be unable to establish nationality because the relevant States do not agree, because proof is unavailable, or because public authorities refuse confirmation. Such a person may not be demonstrably stateless in the strict treaty sense, yet still lacks effective nationality and national protection (UNHCR and IPU, 2005).

That is why this article cannot confine itself to formally stateless persons alone. Documentary failure, administrative non-recognition, destroyed civil records, discriminatory registration practices, and denial of proof may leave a person outside the protection of the law even where a nationality exists on paper. The legal analysis must therefore address both de jure statelessness and situations of ineffective nationality. Otherwise, the discussion becomes unrealistically narrow and misses one of the central features of contemporary exclusion: many people are not denied by explicit legislation, but by the inability to prove what the law supposedly gives them.

1.2 Domestic competence and international limits

Nationality remains principally regulated by domestic law. States decide, through constitutions, nationality codes, decrees, and administrative procedures, who acquires nationality at birth, who may naturalize, how nationality may be lost, and what evidence is required to prove it. This domestic competence is longstanding and still matters. No general rule of international law requires all States to adopt the same model of jus soli or jus sanguinis, and no universal instrument gives an unrestricted right to choose any nationality one prefers.

Even so, the classical sovereignty-first model is no longer sufficient. The turning point is well captured by the Permanent Court of International Justice in the Nationality Decrees Issued in Tunis and Morocco advisory opinion of 1923. The Court accepted that nationality questions fall, in principle, within domestic jurisdiction, but it also stated that this is a relative question dependent on the development of international relations. The point was not symbolic. It meant that domestic competence over nationality could be narrowed by international obligations and by the legal interests of other States (Nationality Decrees Issued in Tunis and Morocco, Advisory Opinion, 1923; UNHCR and IPU, 2005).

The same logic was codified in Article 1 of the 1930 Hague Convention on Certain Questions Relating to the Conflict of Nationality Laws. That provision preserved the rule that each State determines under its own law who its nationals are, but only so far as that law is consistent with international conventions, international custom, and generally recognized principles of law. This is the critical doctrinal shift. State authority over nationality was maintained, but it ceased to be insulated from international legal review (Hague Convention on Certain Questions Relating to the Conflict of Nationality Laws, 1930, art. 1).

After 1945, human rights law deepened that limitation. The legal question ceased to be only whether a State had legislative competence to define its nationals. It became necessary to ask how that competence was exercised, against whom, for what reasons, and with what consequences. International conventions on statelessness, racial discrimination, women’s equality, and children’s rights progressively constrained nationality laws that created statelessness, operated discriminatorily, or denied basic procedural fairness (UDHR, 1948, art. 15; ICCPR, 1966, art. 24(3); CEDAW, 1979, art. 9; CRC, 1989, arts. 7–8).

The European Convention on Nationality is one of the clearest regional expressions of this development. It does not abolish domestic control over nationality. Instead, it organizes that control around common principles: everyone has the right to a nationality, statelessness shall be avoided, arbitrary deprivation is prohibited, and nationality rules must not discriminate. It also adds procedural discipline by requiring written reasons for decisions and access to review. The Convention therefore reflects the modern position with unusual clarity: nationality remains a domestic institution, but it is now surrounded by international standards that regulate substance, procedure, and justification (European Convention on Nationality, 1997, arts. 4, 5, 11 and 12; UNHCR and IPU, 2005).

The practical consequence is that sovereignty has not disappeared, but it has been juridified. A State may still legislate on nationality, yet it cannot do so as though nationality were a closed domestic matter. Treaty bodies, regional courts, and supervisory institutions increasingly assess nationality measures by reference to arbitrariness, discrimination, child protection, proportionality, and procedural legality. What used to be framed as plenary domestic discretion is now better described as regulated national competence.

1.3 The Right to Nationality as a composite right

The Right to Nationality is often introduced through Article 15 of the Universal Declaration of Human Rights. That provision remains fundamental because it states both the positive guarantee and the negative prohibition: everyone has the right to a nationality, and no one shall be arbitrarily deprived of nationality or denied the right to change it (UDHR, 1948, art. 15). Yet the right is not exhausted by that single article. Modern international law has developed it into a composite right made up of several linked guarantees that operate across different treaties and contexts.

The first element is access to nationality in defined circumstances. International law does not grant a free-standing entitlement to any nationality of one’s choice, but it does require States to avoid leaving people without any nationality at all. This is clearest in the law relating to children. Article 24(3) of the ICCPR recognizes every child’s right to acquire a nationality, while Article 7 of the Convention on the Rights of the Child requires implementation of that right, especially where the child would otherwise be stateless. The 1961 Convention gives these principles concrete legislative form by requiring safeguards for children who would otherwise be born stateless (ICCPR, 1966, art. 24(3); CRC, 1989, art. 7; Convention on the Reduction of Statelessness, 1961, arts. 1–4).

The second element is protection against arbitrary deprivation. International law does not treat nationality as irrevocable in every case, but it does sharply limit the grounds on which a State may withdraw it. The 1961 Convention prohibits deprivation where it would render a person stateless, subject to narrow exceptions such as fraud and a small number of retained grounds. Even where deprivation is permitted, it must occur according to law and with a fair hearing. The same logic appears in the European Convention on Nationality, which constrains loss and deprivation even more tightly in several contexts (Convention on the Reduction of Statelessness, 1961, arts. 8–9; UNHCR and IPU, 2005).

The third element is equality in access to nationality. A nationality regime may appear neutral in form but still violate international law if it excludes people on grounds such as race, ethnicity, sex, descent, or family status. That is why the Right to Nationality is inseparable from anti-discrimination norms. The prohibition is not ancillary. It is central, because statelessness has repeatedly been produced by racialized exclusion, discriminatory descent rules, and unequal transmission of nationality between men and women (ICERD, 1965, art. 5(d)(iii); CEDAW, 1979, art. 9; CRC, 1989, art. 2).

The fourth element is procedural protection. A nationality right that exists only in theory can be defeated by silence, delay, inaccessible evidence rules, or unreasoned decisions. Modern nationality law, therefore, includes procedural guarantees when nationality is denied, withdrawn, or refused recognition. Written reasons, access to evidence, the right to challenge decisions, and independent review are not secondary matters. They are part of the right itself, because nationality often turns on administrative judgment and documentary proof rather than on uncontested facts (European Convention on Nationality, 1997, arts. 11–12; Edwards and Van Waas, 2014).

For that reason, the Right to Nationality should be understood as a legal cluster rather than a single isolated entitlement. It includes access to nationality where international law requires attribution, limits on loss and deprivation, equal treatment in acquisition and transmission, protection of children at birth, and due process when status is contested. Any narrower account understates the actual structure of the field and obscures how nationality disputes arise in practice.

2. Normative Structure

2.1 Universal human rights law

The universal framework for the Right to Nationality is dispersed across several treaties rather than concentrated in a single instrument. That structure is not a defect. It reflects the fact that nationality problems arise differently for different groups. Article 15 of the Universal Declaration of Human Rights states the core rule in general terms: everyone has the right to a nationality, and no one may be arbitrarily deprived of it. That provision establishes the field’s foundational grammar, but it does not by itself define the full content of the right or the situations in which States must attribute nationality.

Article 24(3) of the International Covenant on Civil and Political Rights develops the subject through the position of the child. It recognizes that every child has the right to acquire a nationality. Articles 7 and 8 of the Convention on the Rights of the Child go further. They connect nationality with immediate birth registration, a name, and the preservation of identity. The legal logic is clear: childhood is one of the main points at which statelessness is produced, so international law imposes stronger safeguards at birth than it does in many adult cases (ICCPR, 1966, art. 24(3); CRC, 1989, arts. 7–8).

Article 9 of the Convention on the Elimination of All Forms of Discrimination against Women addresses a different vulnerability. Historically, nationality law often treated women as derivative members of the family and denied them equal rights to transmit nationality to their children or retain it after marriage. CEDAW responds by requiring equal nationality rights for women. Its importance is practical, not merely symbolic. Gender discrimination in nationality law has long been one of the most durable causes of intergenerational statelessness (CEDAW, 1979, art. 9).

Article 18 of the Convention on the Rights of Persons with Disabilities adds another layer. It requires States to recognize the rights of persons with disabilities to liberty of movement, freedom to choose residence, and nationality on an equal basis with others. It also protects access to documentation and registration. The point here is that exclusion from nationality is not always created by formal denial. It can also be produced by inaccessible procedures, discriminatory assumptions about legal capacity, or the practical impossibility of obtaining proof. The treaty structure, therefore, appears fragmented, but the fragmentation is functional. Children, women, and persons with disabilities each expose a different weakness in nationality law that a single abstract formula would not adequately address.

2.2 The two statelessness conventions

The two UN statelessness conventions perform different tasks and should not be conflated. The 1954 Convention relating to the Status of Stateless Persons is a protection instrument. Its first function is definitional: it identifies who qualifies as a stateless person through the de jure test in Article 1(1). Its second function is protective: it establishes a basic legal framework for the treatment of stateless persons, including legal status, identity papers, travel documents, access to courts, employment, education, and administrative assistance. It is concerned with people who are already stateless and need a legal status while a durable solution remains absent (Convention relating to the Status of Stateless Persons, 1954; Edwards and Van Waas, 2014).

The 1961 Convention on the Reduction of Statelessness serves a different purpose. It is a prevention and reduction instrument. Its central concern is to stop statelessness from arising in the first place and to restrict later loss or deprivation of nationality. Its safeguards focus especially on children at birth, foundlings, children born abroad, loss of nationality through residence abroad or failure to register, and deprivation that would render a person stateless. It also prohibits deprivation on racial, ethnic, religious, or political grounds and requires a fair hearing where deprivation is permitted by law (Convention on the Reduction of Statelessness, 1961, arts. 1–10).

The distinction is doctrinally important. Protection as a stateless person is not a substitute for possession of a nationality. The 1954 Convention can reduce vulnerability, but it does not solve the underlying exclusion that statelessness represents. A person may receive identity documents, gain some socio-economic rights, and secure a lawful status under that Convention, yet remain outside political membership and outside the ordinary bond of nationality. The deeper objective of international law remains the reduction of statelessness, not simply the better administration of it. The older ILC work on the present statelessness already recognized this point when it treated acquisition of nationality as the real solution and interim status as a secondary measure (ILC, 1954; UNHCR and IPU, 2005).

2.3 Regional standards

Regional law often formulates nationality guarantees more precisely than universal law. The American Convention on Human Rights is the clearest example. Article 20 expressly states that every person has the right to a nationality, that every person has the right to the nationality of the State in whose territory they were born if they do not have the right to any other nationality, and that no one shall be arbitrarily deprived of nationality or the right to change it. This is more specific than Article 15 of the Universal Declaration because it combines the general right, a concrete safeguard against childhood statelessness, and a clear prohibition of arbitrariness in one provision.

African regional law is also unusually direct on childhood nationality. Article 6 of the African Charter on the Rights and Welfare of the Child links the right to a name, immediate birth registration, and the right to acquire a nationality. It also requires States to ensure that a child born in the territory acquires the nationality of that State if no other nationality is available at birth. This is a strong anti-statelessness clause because it addresses the exact point at which exclusion is often first produced. The attached UNHCR handbook correctly emphasizes that African regional law adopted this language to prevent childhood statelessness rather than merely to acknowledge it after the fact.

In Europe, the European Convention on Nationality is especially important because it organizes the whole field around explicit principles. It states that everyone has the right to a nationality, that statelessness shall be avoided, that no one shall be arbitrarily deprived of nationality, and that rules on nationality must not discriminate. It also includes procedural rights and a dedicated chapter on nationality in the context of State succession. In other words, the Convention does not simply repeat the universal framework. It makes avoidance of statelessness and non-discrimination express organizing principles of nationality law (European Convention on Nationality, 1997).

The broader lesson is that regional law often functions as a laboratory of precision. Universal law states the minimum commitments. Regional law frequently clarifies how those commitments operate in concrete fields such as birth registration, succession, deprivation, proof, and review.

2.4 State succession rules

State succession is sometimes treated as a special topic, but that is a mistake. It is one of the recurring settings in which mass exclusion becomes legally possible. When borders shift, federations dissolve, territories separate, or sovereignty is transferred, nationality does not automatically reattach itself in a coherent way. Whole populations may lose one nationality before acquiring another. Much depends on how successor and predecessor States legislate, which connecting factors they choose, and how quickly they act.

The ILC Articles on Nationality of Natural Persons in relation to the Succession of States are central here. They are built around the idea that persons concerned should not become stateless as a result of succession. They rely heavily on habitual residence, appropriate legal connection, territorial origin, and rights of option. These are not abstract technicalities. They are the criteria that often decide whether long-settled populations are included within the successor State or cast outside it (ILC Articles on Nationality of Natural Persons in relation to the Succession of States, 1999).

Habitual residence is especially important because it anchors nationality in lived social reality rather than in distant formalism. The ILC scheme repeatedly treats residence in the affected territory as the primary connecting factor. Appropriate legal connection and territorial origin supplement it where residence alone does not resolve the case. The right of option matters where persons are qualified to acquire more than one nationality. Legislative timing matters just as much. A predecessor State must not withdraw nationality before the successor State has attributed its own, because that gap is exactly where statelessness is created.

The same concern appears in the 1961 Convention, which requires territorial transfer treaties to include provisions securing that no person becomes stateless as a result of the transfer. Where such provisions are absent, the acquiring State must confer its nationality on persons who would otherwise become stateless. This confirms that succession is not a marginal issue. It is a classic stress test for the Right to Nationality because administrative delay, evidentiary burdens, and selective recognition can exclude very large groups at once (Convention on the Reduction of Statelessness, 1961, art. 10).

Regional European instruments reinforce the same idea. The materials in the attached handbook note that the European framework on succession highlights four main principles: genuine and effective link, habitual residence, the will of the person concerned, and territorial origin. It also addresses proof problems directly, recognizing that people affected by succession may be unable to satisfy ordinary documentary standards because archives are destroyed, registration never occurred, or evidence has become impossible to obtain. This is an important reminder that exclusion in succession cases is often produced not only by rules of attribution, but also by rules of proof.

For that reason, state succession must be treated as part of the core normative structure of nationality law. It shows with unusual clarity that the Right to Nationality is not only about individual claims in ordinary administrative settings. It is also about large-scale legal transitions in which entire populations can be included or excluded by the choice of connecting factors and by the timing and design of nationality legislation.

3. Statelessness as a Legal Condition

3.1 De jure and de facto statelessness

International law gives a precise definition to de jure statelessness because legal protection depends on legal identification. Article 1(1) of the 1954 Convention defines a stateless person as someone who is not considered a national by any State under the operation of its law. The definition is technical by design. It asks a legal question, not a sociological one: does any State, applying its own nationality law, recognize the person as its national? (Convention relating to the Status of Stateless Persons, 1954, art. 1(1); UNHCR and IPU, 2005).

That precision is necessary because the 1954 Convention is a status treaty. States need to know who falls within it, and courts and administrators need a rule that can be applied to evidence. A broader and vaguer formula would make recognition inconsistent and weaken protection. The legal category of de jure statelessness, therefore, serves an important function: it creates a stable threshold for rights, procedures, and official status.

Practice, however, regularly encounters people who do not fit neatly within that definition. Some individuals appear to hold a nationality on paper but cannot use it effectively. They may be unable to obtain identity documents, secure confirmation from consular authorities, register births or marriages, return to the supposed State of nationality, or receive any meaningful diplomatic protection. Others are trapped in disputes between States, each refusing recognition or insisting that another State bears responsibility. The attached UNHCR handbook notes that the Final Act to the 1954 Convention expressly showed concern for persons who technically possess a nationality but do not receive the benefits usually associated with it (UNHCR and IPU, 2005).

The distinction between de jure and de facto statelessness, therefore, remains analytically useful. It helps separate formal legal absence of nationality from situations of ineffective nationality. At the same time, the distinction should not be used to minimize lived exclusion. A person who cannot prove or activate nationality may face harms very close to those suffered by a formally stateless person. The correct approach is not to collapse the two categories into one, but to recognize that formal status and practical exclusion are related yet distinct problems. Legal precision is necessary, but formal nationality alone does not always solve the problem of protection.

3.2 Determination procedures

A serious treatment of statelessness cannot stop at definitions. The crucial practical question is how statelessness is identified. The 1954 Convention defines a stateless person, but it does not establish a universal procedure for determining statelessness status. The result is that recognition depends heavily on domestic institutional design. The attached UNHCR handbook is explicit on this point: it is in the interests of both States and affected individuals that legislation designate a decision-maker, define the procedure, and clarify the consequences of recognition (UNHCR and IPU, 2005).

Dedicated determination procedures matter for three reasons. First, they separate statelessness from refugee status, migration control, and ordinary residence disputes. Without a specific procedure, stateless persons are often pushed into asylum systems even when they do not claim persecution in the refugee law sense. Second, they improve consistency by concentrating expertise in a specialized authority. Third, they make the problem visible. Where no determination procedure exists, large numbers of stateless persons remain legally invisible, and the State cannot even measure the scope of the issue (UNHCR and IPU, 2005).

The evidentiary problems are recurrent and severe. Applicants are often expected to produce confirmation from embassies or consulates that they are not nationals, yet this may be impossible where the State refuses cooperation, where records are missing, or where approaching the authorities would itself be unrealistic. In practice, proof may require a combination of nationality legislation, administrative practice, witness evidence, prior documents, expert assessment, and information obtained from several States. This is why statelessness determination is not a mechanical exercise. It requires careful legal and factual analysis of foreign nationality laws and their operation in practice (UNHCR and IPU, 2005).

Poor procedure converts a legal safeguard into an empty promise. If the decision-maker lacks expertise, if the burden of proof is applied rigidly, if applicants have no interpreter or legal advice, or if there is no right to a reasoned decision and review, recognition becomes largely theoretical. The handbook attached to this project identifies core procedural guarantees that follow from due process, including individual examination, objective treatment, time limits, accessible information, interpretation, confidentiality, written reasons, and the possibility of challenge. Without these guarantees, the Convention’s protection framework exists in text but not in practice (UNHCR and IPU, 2005).

3.3 Protection and naturalization

Protection and resolution are not the same thing. Immediate protection concerns the legal position of the stateless person now. It includes recognition of status, identity papers, travel documents, lawful stay or at least protection against arbitrary detention, access to courts, and a basic set of civil, social, and economic rights. That is the function of the 1954 Convention. It does not change the person’s nationality. It reduces vulnerability while statelessness persists (Convention relating to the Status of Stateless Persons, 1954; UNHCR and IPU, 2005).

Long-term resolution requires something more. The condition of being stateless ends only when the person acquires an effective nationality. The attached handbook states this directly and stresses that applying the 1954 Convention is not a substitute for granting nationality. This is the central structural point. A protected stateless person may be safer than an unrecognized one, but still remains outside the ordinary legal bond of nationality and the full framework of membership that nationality creates (UNHCR and IPU, 2005).

Naturalization is therefore a key reduction tool. Article 32 of the 1954 Convention asks States to facilitate the assimilation and naturalization of stateless persons as far as possible, including by expediting proceedings and reducing costs. The attached handbook also notes that some States reduce residence periods for recognized stateless persons and that the European Convention on Nationality encourages facilitated naturalization for lawfully and habitually resident persons, including stateless persons. The underlying logic is simple: a person who has no nationality should not face the same barriers as an ordinary foreign national who already has one elsewhere (UNHCR and IPU, 2005; ILC, 1954).

Naturalization is not the only route. In some situations, international law requires direct attribution of nationality, especially where a child would otherwise be stateless or where territorial transfer would leave persons without nationality. The broader point is that reduction demands a move from tolerated exclusion to legal inclusion. Protection deals with the immediate harms of statelessness. Resolution requires access to nationality itself, either through facilitated naturalization or through direct attribution where international law so requires.

4. Acquisition of Nationality at Birth

4.1 Jus soli, jus sanguinis and conflict of laws

Nationality at birth is usually attributed through two main techniques. The first is jus soli, under which nationality is connected to birth in the territory. The second is jus sanguinis, under which nationality is connected to descent from a national parent. Most States use some combination of both, even if one principle is dominant. The legal problem is not that either model is inherently incompatible with international law. The difficulty arises when territorial rules, descent rules, proof rules, and family-status rules do not align across the States involved (UNHCR and IPU, 2005; de Groot and Vink, 2014).

The classic conflict is simple. A child is born in State A, which attributes nationality mainly by descent. The parents are linked to State B, which attributes nationality mainly by place of birth. Each rule is formally valid within its own legal system, yet the child may receive neither nationality. The attached UNHCR handbook gives this exact type of example and shows why statelessness is often produced by interaction rather than by an openly abusive single law. International law, therefore, addresses not only discriminatory exclusions, but also conflicts between otherwise ordinary nationality systems (UNHCR and IPU, 2005).

The same problem appears in less obvious forms. A State may require proof of lawful marriage before descent through the father is recognized. Another may require prior registration at a consulate before the descent acquired abroad becomes effective. A third may refuse transmission by the mother or may make nationality dependent on residence, age, or later application. In each case, the rule may appear administratively defensible in isolation. Combined with the law of another State, it can leave the child without nationality. This is why the law of statelessness cannot be understood solely by reading one nationality code at a time. It requires attention to the cumulative effect of several systems operating at once.

International law does not force a single universal model of attribution at birth. It does, however, require States to legislate against the predictable gaps created by conflicts of law. The 1961 Convention responds directly by requiring nationality for persons who would otherwise be stateless, through attribution at birth or by later application under limited conditions. The Convention, therefore, acts as a corrective mechanism where ordinary jus soli and jus sanguinis rules fail to produce a result (Convention on the Reduction of Statelessness, 1961, arts. 1 and 4).

4.2 Children who would otherwise be stateless

Children occupy a privileged position in the international law of nationality because exclusion at birth has cumulative and often irreversible consequences. A child who enters life without nationality may later struggle to obtain registration, identity documents, education, health care, residence security, and formal employment. International law, therefore, gives children stronger claims than adults to initial attribution of nationality. The core idea is preventive. It is easier, fairer, and legally cleaner to avoid statelessness at birth than to remedy it years later through discretionary naturalization or litigation.

This child-specific logic appears across the universal and regional framework. Article 24(3) of the ICCPR provides that every child has the right to acquire a nationality. Article 7 of the Convention on the Rights of the Child links that right to immediate birth registration and requires implementation where the child would otherwise be stateless. Article 6 of the African Charter on the Rights and Welfare of the Child moves in the same direction by requiring that a child born in the territory who is not granted another nationality should acquire the nationality of that State. These provisions do not treat nationality as a distant political entitlement. They treat it as part of the child’s immediate legal protection (ICCPR, 1966, art. 24(3); CRC, 1989, art. 7; African Charter on the Rights and Welfare of the Child, 1990, art. 6).

The 1961 Convention gives this principle its most detailed legal form. Article 1 requires a Contracting State to grant its nationality to a person born in its territory who would otherwise be stateless. States may choose attribution by operation of law at birth or attribution upon application, but the conditions attached to application are limited. They may include residence, age limits, and proof that the person has always been stateless, but they cannot be used to empty the safeguard of practical effect. Article 4 extends protection to certain children born abroad who would otherwise be stateless and whose parent had the nationality of the State concerned at the time of birth (Convention on the Reduction of Statelessness, 1961, arts. 1 and 4).

The reason children receive stronger claims than adults is not sentimental. It is structural. Newborns do not choose the conflict of laws into which they are born. They cannot correct administrative failures, secure consular proof, or control family-status documentation. Their vulnerability is total, and the consequences of exclusion begin immediately. International law, therefore, places the burden on States to prevent statelessness at the moment of birth rather than expecting the child to repair the system later.

4.3 Birth registration and proof of identity

Birth registration and nationality are not the same thing. Registration records the fact of birth and usually identifies the date, place, and parentage. Nationality is the legal status that flows from the applicable nationality law. A birth certificate does not automatically create nationality, and a person may possess nationality even if registration was delayed or omitted. That distinction must be kept clear because many legal systems confuse documentary proof with the existence of status.

Even so, birth registration is often the gateway through which nationality can later be proven. The attached UNHCR handbook states the point bluntly: without proof of birth, it is almost impossible for a child to establish identity and thus acquire nationality. Registration provides the primary evidence of birthplace, parentage, and continuity of legal presence, all of which may be decisive under jus soli and jus sanguinis systems alike. When registration fails, downstream exclusion becomes much more likely, especially for poor, displaced, rural, minority, and cross-border populations (UNHCR and IPU, 2005).

This is why failures in civil registration generate nationality problems that may appear only years later. A child whose birth is never recorded may be unable to prove that the birth occurred in the territory. A child born abroad may be unable to prove descent from a national parent. A child of unmarried parents may be unable to establish legal affiliation. By the time these issues emerge, the case is often treated as a documentation problem, when the deeper problem is the loss of the evidentiary foundation on which nationality law depends.

The relevance of Sustainable Development Goal 16.9 lies here. That target calls for legal identity for all, including birth registration, by 2030 (UN General Assembly, 2015). Its significance for nationality law is practical rather than rhetorical. Legal identity systems do not replace nationality safeguards, but they make those safeguards operable. If the State cannot record births reliably and accessibly, anti-statelessness norms remain under-enforced. For that reason, birth registration should be treated as a preventive nationality measure, even though it is not itself a rule of attribution.

4.4 Foundlings, children born abroad and proof problems

Some of the hardest birth-related nationality cases are recurring enough to require specialized legal techniques. Foundlings are the clearest example. Because parentage and place of origin are unknown, ordinary descent rules cannot function. International law solves this through a rebuttable presumption. Article 2 of the 1961 Convention provides that a foundling found in the territory shall, in the absence of proof to the contrary, be considered born in that territory to parents possessing the nationality of that State. The legal technique matters. The child is protected immediately, but the presumption may be displaced later if contrary evidence emerges (Convention on the Reduction of Statelessness, 1961, art. 2).

Children born abroad present a different problem. Territorial birth does not help them, and descent may depend on registration, marital status, gendered transmission rules, or proof of parentage. Article 4 of the 1961 Convention, therefore, requires nationality for a person not born in the territory who would otherwise be stateless, where one parent possessed the nationality of the State at the time of birth. The State may require an application and may attach limited conditions, but it cannot leave the child outside the system indefinitely. This is especially important for children of refugees, stateless parents, migrant workers, and persons in exile, whose documentary chains are often broken (Convention on the Reduction of Statelessness, 1961, art. 4).

The Convention also addresses births in transit. Article 3 provides that birth on a ship or aircraft is deemed to have taken place in the territory of the flag State or the State of registration of the aircraft. This rule is technical, but its function is straightforward: it prevents uncertainty over the place of birth from creating a gap in nationality attribution. The provision shows how anti-statelessness law works. It often does not announce grand principles. It fixes narrow legal points where exclusion predictably arises (Convention on the Reduction of Statelessness, 1961, art. 3).

Children whose parentage cannot be proven raise a different evidentiary challenge. International law leaves States some margin to regulate proof, but that margin is not unlimited. If evidentiary burdens are unrealistic, if family-status rules are discriminatory, or if the child is denied any workable route to establish nationality where statelessness is foreseeable, exclusion becomes unlawful. The same is true for children born out of wedlock and children of stateless or refugee parents.

The attached handbook stresses that children born out of wedlock should have the same access to nationality at birth as other children and that foundlings should receive the nationality of the State where they are found. These are examples of technique serving substance: presumptions, flexible proof rules, and child-centered interpretation are used to prevent statelessness before it hardens into long-term exclusion (UNHCR and IPU, 2005).

The broader legal lesson is that birth-related statelessness is often solved through presumptions and burden allocation rather than through abstract declarations alone. International law allows States room to organize administration and evidence. It does not allow them to design those systems so narrowly that a child who should be protected is excluded because the required proof can never realistically be produced.

5. Equality and Non-Discrimination

5.1 Women and family-based discrimination

Nationality law was historically built around a family model in which the husband was treated as the primary legal subject and the wife as a derivative member of his legal status. Under that structure, a woman could lose her nationality through marriage, acquire her husband’s nationality automatically, or be prevented from transmitting nationality to her children on equal terms with men. The legal premise was that the family should have a single nationality attached to the male head of household, not that each adult should hold an autonomous status in law (Edwards and Van Waas, 2014; UNHCR and IPU, 2005).

Article 9 of the Convention on the Elimination of All Forms of Discrimination against Women rejects that structure directly. It requires equal rights with men to acquire, change, or retain nationality, and it also requires equal rights with respect to the nationality of children (CEDAW, 1979, art. 9). The importance of this provision is practical. It protects the woman’s own legal bond with the State, and it also addresses one of the recurring causes of childhood statelessness: unequal transmission rules within the family.

Gender discrimination can still produce child statelessness even after partial reform. A State may formally allow maternal transmission but keep rules on proof of marriage, paternity, residence, or registration that place mothers and children at a structural disadvantage. A child may also be left without nationality where the father is unknown, stateless, unwilling to acknowledge paternity, or unable to pass on his nationality under foreign law. In those cases, formal equality on paper does not eliminate the underlying risk of exclusion (UNHCR and IPU, 2005; de Groot and Vink, 2014).

5.2 Race, ethnicity, descent and exclusion

The equality issue in nationality law cannot be understood only through general anti-discrimination clauses. Nationality law has repeatedly been used as a tool of racial, ethnic, and descent-based exclusion. Sometimes this occurs through direct denationalization or selective deprivation. In other cases, exclusion is indirect and administrative: restrictive proof rules, biased civil registry practices, or the use of migration status as a proxy for ethnicity. Article 5(d)(iii) of the Convention on the Elimination of All Forms of Racial Discrimination is significant because it places the right to nationality within the core framework of racial equality (ICERD, 1965, art. 5(d)(iii)).

The Dominican Republic cases show how this works in practice. In Yean and Bosico v Dominican Republic, the Inter-American Court addressed the denial of birth certificates and nationality to girls born in the territory whose families were treated as foreign because of Haitian descent. The legal issue was not just documentation. It was the use of civil status rules and migration arguments to exclude a stigmatized population from membership. Later regional litigation and reporting showed that this pattern could develop into large-scale denationalization through retrospective reinterpretation of nationality law (Yean and Bosico v Dominican Republic, 2005; Edwards and Van Waas, 2014).

African practice concerning children of Nubian descent in Kenya points to the same problem. The difficulty was not only the absence of a formal entitlement. It was the persistent refusal to recognize that entitlement through birth registration and nationality documentation. This is a useful reminder that descent-based exclusion is often sustained through proof systems that appear neutral but operate predictably against particular communities. Nationality law may look facially general while functioning as an instrument of ethnic boundary control (African Committee of Experts on the Rights and Welfare of the Child, 2011; UNHCR and IPU, 2005).

5.3 Disability and other hidden barriers

Formal equality is not enough if the administrative process makes access to nationality impossible for protected groups. Article 18 of the Convention on the Rights of Persons with Disabilities requires equal rights to nationality and protects access to documentation and registration on an equal basis with others (CRPD, 2006, art. 18). The doctrinal point is straightforward: exclusion can be produced not only by the substantive rule, but also by the way the rule is administered.

This problem extends beyond disability. Illiteracy, poverty, remoteness, and language barriers often determine who can register a birth, complete nationality procedures, gather documents, or attend hearings. Excessive fees, short deadlines, distant administrative offices, and rigid evidentiary demands can block access for groups that the law nominally protects. A nationality regime may be equal in text and unequal in operation (UNHCR and IPU, 2005).

For legal analysis, that means equality must be read together with accessibility, procedural fairness, and institutional design. If the route to recognition is too costly, too remote, or too complex for those most at risk, the State cannot rely on formal neutrality as a complete answer. In nationality law, non-discrimination requires not only equal rules, but workable access to the status those rules promise.

6. Loss, Deprivation and Denial of Nationality

6.1 Arbitrary deprivation

Arbitrary deprivation is the doctrinal center of the modern law of nationality. Article 15 of the Universal Declaration of Human Rights does not prohibit every deprivation of nationality. It prohibits arbitrary deprivation. That choice of language is important because arbitrariness is broader than mere illegality. A nationality measure may comply with domestic legislation and still be arbitrary under international law if its purpose, effects, or procedure are incompatible with basic legal standards (UDHR, 1948, art. 15; Edwards and Van Waas, 2014).

Arbitrariness has both substantive and procedural dimensions. On the substantive side, deprivation must be grounded in law, pursue a legitimate purpose, and respect necessity and proportionality. It must also avoid discrimination and, as a general rule, avoid creating statelessness. On the procedural side, the person affected must receive a fair hearing, written reasons, and access to effective review before an independent body. A nationality decision that strips status without these guarantees is not just badly administered. It is legally defective at the level of the right itself (Convention on the Reduction of Statelessness, 1961, arts. 8–9; European Convention on Nationality, 1997, arts. 4, 11 and 12).

The attached UNHCR handbook captures this structure clearly. It notes that no one should be deprived of nationality if that deprivation results in statelessness, except in narrow cases set out in the 1961 Convention. It also emphasizes that any such deprivation must be in accordance with law and accompanied by full procedural guarantees, such as the right to a fair hearing. The same material stresses that deprivation on racial, ethnic, religious, or political grounds is prohibited (UNHCR and IPU, 2005).

This means that arbitrariness cannot be reduced to a checklist of formal legality. A State may cite a lawful statutory ground and still act arbitrarily if the measure is excessive, discriminatory, unsupported by convincing reasons, or implemented through opaque and unfair procedure. In nationality law, substance and process cannot be separated cleanly. A deprivation decision often becomes arbitrary because both fail at once.

6.2 Fraud, loyalty and security grounds

International law does not ban every deprivation of nationality. It narrows the lawful grounds sharply. The classic case is fraud or misrepresentation in the acquisition of nationality. This is the least controversial ground because the State is not usually said to be withdrawing a validly acquired status for later conduct. It is correcting an acquisition said to have been procured through deception. Even here, the legal analysis is not automatic. The allegation of fraud must be established carefully, and the response must remain proportionate, especially where long residence, family life, and the risk of statelessness are involved (Convention on the Reduction of Statelessness, 1961, art. 8(2)(b); European Convention on Nationality, 1997, art. 7(1)(b)).

The harder cases concern loyalty and security. The 1961 Convention permits certain deprivations linked to conduct seriously prejudicial to the vital interests of the State, service to another State contrary to express prohibition, formal allegiance to another State, or repudiation of allegiance. Those grounds are tightly limited. A State may rely on them only if it retained the relevant power at the time of signature, ratification, or accession, and only if the deprivation occurs in accordance with law and with full procedural guarantees (Convention on the Reduction of Statelessness, 1961, art. 8(3); UNHCR and IPU, 2005).

Security discourse has become the major contemporary stress point because nationality deprivation is now often presented as a counter-terrorism tool rather than as a classic nationality measure. In these cases, the stated justification is not fraud in acquisition but later disloyalty, danger, or association with hostile activity. This shifts deprivation from correction of status to punishment or preventive security. That shift matters because it increases the risk that nationality law will be used as an instrument of exclusion rather than as a framework of membership governed by stable legal limits (Edwards and Van Waas, 2014).

The European Convention on Nationality reflects a more restrictive position when statelessness would result. The attached UNHCR handbook notes that the Convention limits deprivation much more sharply and, in cases leading to statelessness, treats fraud or misrepresentation as the principal accepted ground. This contrast is revealing. It shows that international law has not accepted a broad free-standing power to strip nationality on open-ended security grounds. The lawful space is narrow, and modern security arguments test that limit at its weakest point (UNHCR and IPU, 2005).

6.3 Due process, review and remedies

Procedure is not secondary in nationality deprivation cases. It is part of the legality of the measure. A person facing loss or denial of nationality must have notice of the case against them, access to the evidence relied upon, an opportunity to respond, and a written decision setting out the reasons. Review must be real and effective, not nominal. If the procedure is opaque, rushed, or one-sided, the deprivation is vulnerable to challenge even before the substantive ground is examined (European Convention on Nationality, 1997, arts. 11–12; ILC, 1999, arts. 16–17).

The attached handbook lists core due process guarantees that are equally relevant here: individual examination, objective treatment, a time limit on the procedure, access to information in a language the person can understand, access to legal advice and an interpreter, delivery of the decision and the reasons for it, and the possibility to challenge legality. These guarantees are not luxuries. In nationality cases, the facts often involve foreign law, family history, identity records, and security allegations that the individual may be unable to answer without full procedural access (UNHCR and IPU, 2005).

Judicial review is especially important where deprivation is followed by immigration detention, expulsion, or attempted removal. In that setting, review must be available before the person is irreversibly removed. If an appeal exists only on paper while the person is expelled before it can be heard, the remedy is ineffective. The same logic supports suspension of removal while a serious challenge to deprivation is pending. Otherwise, the individual may lose both nationality and meaningful access to a court.

Where deprivation is found unlawful, the remedy must be capable of restoring the person’s legal position. In some cases, that means formal restoration of nationality. In others, it may require recognition that nationality was never validly lost, quashing of the deprivation order, correction of civil registry records, or reversal of linked immigration measures. A remedy that merely acknowledges error without restoring status will often be inadequate. In nationality law, effective review requires effective correction.

7. State Succession and Mass Denationalization

7.1 Territorial change and habitual residence

State succession is one of the clearest settings in which nationality law reveals its coercive power. When territory is transferred, federations dissolve, States separate, or constitutional orders are replaced, nationality does not automatically follow the affected population. If the successor State defines membership too narrowly, or if the predecessor State withdraws nationality too quickly, large groups can be pushed outside the legal bond of nationality almost overnight. For that reason, succession cases cannot be resolved by abstract appeals to sovereignty alone. The central legal question is not only which State now governs the territory, but how nationality should be allocated to the people whose lives are rooted there (ILC, 1999; UNHCR and IPU, 2005).

Habitual residence has become the most practical connecting factor in this field. It links nationality to the real social world of the person rather than to a distant formal category. A person who has long lived in the territory, built family life there, worked there, and participated in the ordinary institutions of the community has a stronger claim to inclusion than someone who possesses only a remote legal tie. The International Law Commission reflected this approach in its Articles on Nationality of Natural Persons in relation to the Succession of States, which repeatedly treat habitual residence as a primary criterion for attribution after succession (ILC, 1999, arts. 5, 14 and 18).

This approach is not just administratively convenient. It responds to the legal reality that nationality in succession cases is often about continuity of social membership. Residence, family life, schooling, employment, and long-term settlement may show that exclusion is not a neutral technical choice but a rupture in the legal identity of an already integrated population. A succession rule that disregards those connections and instead relies on rigid ethnic, archival, or historical tests risks turning political reorganization into unlawful exclusion.

That point becomes even sharper where documentary evidence is weak or unevenly distributed. Populations affected by succession may lack complete records because of war, displacement, administrative collapse, or discriminatory registration practices under the prior regime. If the successor State insists on exacting documentary proof without accommodating these realities, it may exclude groups whose connection to the territory is obvious in social terms. In succession law, evidentiary rules can be just as decisive as substantive nationality rules.

7.2 Genuine links, choice and effective nationality

The idea of a genuine link has an important but limited place in nationality law. It is often associated with Nottebohm, where the International Court of Justice examined whether Liechtenstein could exercise diplomatic protection against Guatemala on behalf of Nottebohm. The Court focused on the effectiveness of the nationality in the specific international context before it. That case did not create a general doctrine authorizing States to deny nationality to long-settled populations whenever the State considers their connection insufficient. Its subject was opposability in diplomatic protection, not the full content of the law of nationality at birth, naturalization, or succession (ICJ, 1955).

That limitation matters because genuine connection arguments can be misused. In a careful and narrow sense, the idea is useful. It helps explain why nationality allocation after succession should reflect actual social attachment rather than pure administrative convenience. It can also support the claim that long-resident populations should not be excluded by sudden constitutional change. A person’s life in the territory, family relations, schooling, work history, and everyday legal dependence on the State can show a connection strong enough to make exclusion difficult to justify (ILC, 1999; European Convention on Nationality, 1997).

The same language can also mask exclusion. A State may invoke lack of genuine connection as a way of reclassifying disfavored groups as outsiders, even where those groups have lived in the territory for generations. This is especially dangerous when the test is tied to ethnicity, language, ancestry, or selective documentary criteria. In such cases, “genuine link” ceases to be an inclusive tool for identifying real social membership and becomes a rhetorical device for withholding nationality.

Choice also matters in succession cases, but it is not unlimited. International law recognizes that where a person has real ties to more than one successor State, some room for option may be appropriate. The ILC Articles refer to the will of the person concerned as a relevant factor, especially where multiple connecting factors exist (ILC, 1999, art. 11). Still, choice cannot be used to justify forced exclusion. A State cannot lawfully deny nationality to a settled population on the assumption that another nationality could have been chosen, applied for, or pursued elsewhere, when the person’s actual life remains anchored in the territory concerned.

Effective nationality is best understood here as a discipline of state power. It directs attention to the real legal relationship between a person and the State. Used carefully, it supports the inclusion of those whose lives are genuinely tied to the successor State. Used carelessly, it can become a vocabulary for exclusion. That is why Nottebohm must be handled with caution in succession cases.

7.3 Group exclusion after constitutional change

Mass denationalization often does not begin with a statute that openly strips nationality from a named population. It begins with constitutional transition, administrative reclassification, and registry decisions that appear technical on their face. Dissolution of federations, declarations of independence, and replacement of constitutional orders can all produce new nationality frameworks. If the new framework is applied selectively, groups can lose legal status not through a single dramatic act but through a chain of administrative measures: removal from registers, refusal of documentation, loss of residence rights, and denial of access to public services.

The experience of post-Yugoslav transitions is central here. Kurić and Others v Slovenia is one of the clearest judicial accounts of how this process unfolds. The applicants were removed from the register of permanent residents after Slovenia’s independence because they had not applied for Slovenian citizenship or for another recognized status within the new legal framework. The consequences went far beyond a technical registry issue. They lost lawful residence, documents, employment, access to social rights, and legal security. Some were rendered extremely vulnerable to deportation and long-term exclusion. The European Court of Human Rights treated the case as a profound interference with private and family life and emphasized the seriousness of the administrative erasure (ECtHR, 2012).

Kurić is important because it shows how nationality-related exclusion can develop through the interaction of status loss and documentation loss. Once a person is removed from the register, proving lawful residence becomes harder. Once residence becomes uncertain, access to employment, health care, and family documentation deteriorates. Once documentation is lost, the person may be unable to establish any secure legal bond with the State. The result may be formal statelessness, or a condition close to it, even if the legal system does not immediately declare the person stateless.

This pattern is not confined to Slovenia. Constitutional change often creates opportunities for registry “cleansing,” retrospective reinterpretation of nationality rules, and the treatment of previously accepted residents as foreigners. These practices are especially dangerous where the targeted population is already politically weak or ethnically stigmatized. Administrative categories then become instruments of boundary-making. A registry ceases to be a neutral civil record and becomes a gatekeeping device that determines who belongs and who can be pushed outside the legal order.

The legal lesson is direct. State succession and constitutional transition must be governed by inclusive nationality rules, realistic evidentiary standards, and transitional guarantees that protect continuity of status. Without those safeguards, political transformation can become a vehicle for mass denationalization under administrative cover. Kurić remains a model case because it exposes the mechanics of that process with unusual clarity: loss of status, loss of documentation, loss of residence, and cascading exclusion from the protection of the law (ECtHR, 2012; UNHCR and IPU, 2005).

8. Statelessness, Migration and Removal

8.1 Expulsion, return and re-entry problems

Statelessness often becomes legally visible when a State tries to remove a person. Migration control assumes that another State will receive the individual after expulsion. That assumption fails when the person has no nationality, cannot prove it, or is rejected by every State potentially connected to the case. In those situations, a person may be removable in theory, but unreturnable in practice, and migration control turns into a legal deadlock (UNHCR and IPU, 2005; Edwards and Van Waas, 2014).

The 1954 Convention reflects this problem indirectly. It permits expulsion of a stateless person lawfully staying in the territory only on grounds of national security or public order, and even then, subject to due process guarantees. The same handbook explains that, once a final expulsion decision has been taken, the person must be given sufficient time to obtain admission into another country. That requirement only makes sense because the central practical obstacle is often admission, not the existence of a removal order (Convention relating to the Status of Stateless Persons, 1954, art. 31; UNHCR and IPU, 2005).

Nationality disputes also surface early in re-entry and documentation conflicts. A person who leaves a country may be unable to return because no passport is issued, nationality is no longer recognized, or the civil record needed to prove status cannot be produced. Others encounter the same problem at the point of deportation, when the receiving State refuses entry because nationality is uncertain. What appears to be an immigration dispute is often, at a deeper level, a dispute about legal membership and proof of identity (UNHCR and IPU, 2005).

8.2 Detention and non-refoulement risks

Uncertain nationality and deprivation of nationality can produce prolonged detention because the State seeks removal but cannot execute it. If no country accepts the person, detention may continue while authorities attempt to establish nationality or secure travel documents. The attached handbook notes that stateless persons outside their country of former residence may be detained for long periods when those countries refuse re-entry. This is one of the clearest points at which nationality law and detention law intersect (UNHCR and IPU, 2005).

The same handbook also links the expulsion of stateless persons with the wider principle of non-refoulement. It states that non-refoulement is a generally accepted principle of international law and refers to Article 33 of the 1951 Refugee Convention, Article 3 of the Convention against Torture, and Article 7 of the ICCPR as core sources of protection against return to serious harm (UNHCR and IPU, 2005). The legal consequence is important. A stateless or denationalized person cannot be treated as a mere documentation problem if removal would expose them to persecution, torture, or other serious violations because no secure legal status can be re-established after return.

For that reason, nationality deprivation, detention, and refugee protection should not be analyzed in isolation. Loss of nationality may trigger immigration detention. Detention may then be prolonged because removal is impossible. Attempted removal may, in turn, engage non-refoulement obligations if the person faces serious harm or legal invisibility in the receiving State. A sound legal analysis has to follow this full chain rather than separating each part into a different doctrinal box.

8.3 Diplomatic protection and its limits

Diplomatic protection is only a limited corrective to statelessness. Under Article 8 of the ILC Articles on Diplomatic Protection, a State may exercise diplomatic protection in respect of a stateless person who, at the date of injury and at the date of the official presentation of the claim, is lawfully and habitually resident in that State (ILC, 2006, art. 8). This is significant because it recognizes that a stateless person may still have a sufficiently strong connection with a State to justify external protection.

That mechanism has to be kept in proportion. Diplomatic protection does not create nationality, does not transform the person into a national, and does not resolve statelessness as a legal condition. The 1954 Convention handbook is explicit on a closely related point: the issuance of identity or travel documents does not imply a grant of nationality and does not grant a right to diplomatic protection. Status management and nationality remain distinct (UNHCR and IPU, 2005).

The older ILC materials on present statelessness make the same structural point differently. They treated diplomatic protection by the country of residence as a provisional device pending acquisition of nationality, not as a substitute for nationality itself. The long-term solution remained acquisition of an effective nationality, usually that of the country of residence (ILC, 1954).

The legal conclusion is narrow but important. Diplomatic protection may soften some consequences of statelessness in particular disputes, but it does not replace the legal bond of nationality. It is a remedial mechanism of limited scope, not a cure for exclusion from membership.

9. Comparative Jurisprudence

9.1 Inter-American case law

Inter-American case law has been especially important in showing that State authority over nationality is limited by human rights obligations. The leading judgment is Yean and Bosico v Dominican Republic, where the Inter-American Court held that the State could not administer nationality law in a way that denied effective enjoyment of rights protected under the American Convention. The case concerned two girls born in the Dominican Republic who were refused birth certificates because of the Haitian origin of their mothers. The Court treated this not as a minor registry dispute but as a nationality case with wider human rights consequences, including vulnerability to statelessness and exclusion from education (Yean and Bosico v Dominican Republic, 2005; Inter-American Court of Human Rights, 2014).

A central doctrinal point in Yean and Bosico is that migration status cannot simply be transmitted to children. The irregular or precarious status of parents does not justify treating a child as legally foreign when the child has an independent claim under the applicable nationality framework. This is one of the Court’s most important contributions. It prevents States from using migration control as a back door to deny nationality to children born in the territory, especially where the burden of that approach falls on racialized or stigmatized groups (Yean and Bosico v Dominican Republic, 2005; MacKay, 2014).

The case also shows that denial of documentation can amount, in practice, to denial of nationality. A State may avoid formally declaring that a person lacks nationality while making it impossible to prove nationality through the refusal of birth registration and civil status documents. Inter-American jurisprudence has treated this kind of administrative denial seriously because it produces concrete exclusion from schooling, health care, and legal recognition. Later cases and reports concerning persons of Haitian descent in the Dominican Republic reinforced this reasoning and exposed how denationalization can occur through retrospective reinterpretation of nationality law and documentary erasure rather than through a single explicit legislative act (Inter-American Court of Human Rights, 2014; de Chickera and Foster, 2016).

9.2 European case law

European law approaches nationality through a different doctrinal route. The European Convention on Human Rights does not contain a free-standing general right to nationality. As a result, the European Court of Human Rights has usually addressed nationality disputes through Article 8 on private and family life, Article 14 on discrimination, and proportionality review. That distinction is analytically important. European law does not deny the significance of nationality, but it tends to frame the issue through the effects of nationality decisions on individual life rather than through a direct autonomous right to a nationality (Genovese v Malta, 2011; Kurić and Others v Slovenia, 2012).

Genovese v Malta is the clearest example. The Court did not declare a general Convention right to nationality. It held that where nationality law falls within the ambit of private life, discrimination in access to that status can violate Article 14 read with Article 8. The case involved discrimination against a child born out of wedlock in the acquisition of Maltese nationality through descent. Its importance lies in the Court’s recognition that nationality is not a purely abstract legal label. It is closely linked to social identity and personal status, which brings it within the protective reach of private life doctrine (Genovese v Malta, 2011; van Waas, 2014).

Kurić and Others v Slovenia demonstrates the same method in a more dramatic context. The applicants were removed from the register of permanent residents after independence and then suffered cascading losses of status, documentation, work, social rights, and legal security. The Court treated the “erasure” as a serious interference with private and family life. The judgment did not turn on a free-standing right to nationality, but on the way nationality-related exclusion reshaped the applicants’ legal existence. It remains one of the strongest European examples of how administrative status loss can approach statelessness or quasi-statelessness even when the legal language used by the State is bureaucratic rather than openly denationalizing (Kurić and Others v Slovenia, 2012; Shaw, 2021).

The deprivation cases sharpen the European emphasis on proportionality. In cases such as Ramadan v Malta and Ghoumid and Others v France, the Court examined whether deprivation of nationality pursued a legitimate aim, followed fair procedure, and struck a proportionate balance in light of the consequences for the individual. This line of authority does not imply that deprivation is always unlawful. It does show that European law treats nationality loss as a serious interference requiring justification, scrutiny, and attention to individual consequences rather than as an unrestricted sovereign prerogative (Ramadan v Malta, 2016; Ghoumid and Others v France, 2020; de Groot and Vink, 2014).

9.3 African case law

African jurisprudence has been especially strong on the relationship between nationality, birth registration, non-discrimination, and access to social rights. The most cited decision is the Institute for Human Rights and Development in Africa and Open Society Justice Initiative on behalf of the Children of Nubian Descent in Kenya v Kenya. The African Committee of Experts on the Rights and Welfare of the Child held that the failure to recognize and register children of Nubian descent as Kenyan violated the African Children’s Charter. The Committee linked nationality directly to birth registration and made clear that delayed or denied registration can become a mechanism of exclusion from the very beginning of life (African Committee of Experts on the Rights and Welfare of the Child, 2011).

The importance of the Nubian children litigation lies in its practical realism. The problem was not only that children lacked a formal declaration of nationality. It was that they were blocked at the stages of registration, proof, and access to documents. The Committee recognized that this legal uncertainty affected education, health care, freedom of movement, and the ordinary ability to live as a rights-bearing person in society. In African jurisprudence, nationality is not treated as detached from daily life. It is approached as a gateway status whose denial disrupts a range of other protected interests (African Committee of Experts on the Rights and Welfare of the Child, 2011; Manby, 2018).

African standards have reinforced this approach. Article 6 of the African Charter on the Rights and Welfare of the Child links immediate birth registration with the right to acquire a nationality, and the Committee’s interpretive work has emphasized that these guarantees must be read together. The result is a stronger child-centered jurisprudence than is often found elsewhere. It treats registration failure, ethnic discrimination, and denial of nationality as legally connected rather than as separate administrative problems (African Charter on the Rights and Welfare of the Child, 1990, art. 6; African Committee of Experts on the Rights and Welfare of the Child, 2014).

This makes African jurisprudence especially valuable for comparative analysis. It shows that nationality law cannot be assessed only by reading the text of nationality statutes. Courts and monitoring bodies must also examine how registration systems work, which communities bear the evidentiary burden, and how exclusion from nationality affects access to education, health care, and legal recognition. On these issues, African doctrine has developed one of the most integrated approaches in contemporary international law (Manby, 2018; Blitz and Lynch, 2011).

Also Read

• How International Law Deals with Stateless Persons

• The Principle of Non-Refoulement

• Convention on the Rights of the Child (1989)

• The Universal Declaration Of Human Rights

• State Recognition And Succession In International Law

• Climate Refugees and International Law

• Principles Of Jurisdiction In International Law

• Introduction to International Law

10. Implementing the Right to Nationality

10.1 Legislative design

Implementation begins with legislation. A State can endorse the Right to Nationality in principle and still produce statelessness through poor drafting. The most important legislative safeguard is a clear rule granting nationality to children who would otherwise be stateless, either automatically at birth or through a simple and realistic application process. The same applies to foundlings, children born out of wedlock, and children born abroad to nationals where no other nationality is available. These are not optional refinements. They are the points at which nationality law most often fails in practice (UNHCR and IPU, 2005; Convention on the Reduction of Statelessness, 1961).

Equal transmission by mothers and fathers is another core design choice. If a nationality code still ties transmission to paternal status, or imposes heavier proof burdens on mothers, the law continues to reproduce child statelessness even after formal reforms. The attached UNHCR handbook is explicit that women should have equal rights with men concerning the nationality of their children and that non-discrimination on grounds of sex must be built into citizenship legislation (UNHCR and IPU, 2005).

Restrictions on deprivation powers must also be drafted with precision. The reasons for deprivation should be clearly defined, statelessness should be avoided, and procedural guarantees should be written into the statute itself rather than left to administrative discretion. The same is true in succession clauses. If the State has emerged through succession or territorial change, the legislation should address habitual residence, genuine and effective links, the will of the person concerned, and territorial origin. Bad drafting is a major source of statelessness because it leaves decisive questions unresolved until they are answered through exclusionary administrative practice (UNHCR and IPU, 2005).

10.2 Administrative systems

A rights-compliant nationality regime can still fail if the administration is opaque, punitive, remote, or excessively document-heavy. Civil registry design is central. If births are not systematically registered, or if disputed nationality cases are not identified early, the legal safeguards contained in nationality legislation may never become operative. The handbook attached to this project recommends that States resource local administration adequately, ensure systematic birth registration, and grant citizenship where a child would otherwise be stateless (UNHCR and IPU, 2005).

Documentation procedures are equally important. Many nationality systems fail not because the entitlement is absent, but because the applicant cannot satisfy documentary requirements. Excessive fees, deadlines that cannot realistically be met, and demands for records held by another State can all block acquisition, recovery, or certification of nationality. The same handbook stresses that applications relating to acquisition, retention, loss, recovery, or certification of nationality should be processed within a reasonable period and that fees for nationality procedures and related review should be reasonable (UNHCR and IPU, 2005).

Late registration and appeal routes must also be workable. If a person misses an early registration deadline, the law should provide a realistic route for later proof rather than converting a clerical failure into permanent exclusion. Appeal mechanisms matter for the same reason. Administrative error is common in nationality cases, especially where family records, migration histories, and succession issues intersect. If the administration is inaccessible or inflexible, the legal regime may look compliant on paper while functioning as a barrier in practice.

10.3 Litigation and institutional oversight

Oversight matters most where exclusion is bureaucratic rather than openly legislative. Treaty bodies, regional courts, ombuds institutions, and specialized agencies become crucial when the formal law appears acceptable, but the administration systematically blocks access. In nationality matters, denial often occurs through silence, delay, inconsistent registry practice, impossible proof demands, or undocumented executive decisions. Those forms of exclusion are less visible than explicit denationalization, but they can be just as damaging.

Treaty bodies and regional courts provide interpretive discipline. They force States to justify how nationality rules operate in practice, not just how they are written. Ombuds institutions and national human rights bodies can also be valuable because they are often better placed to identify recurring administrative patterns, especially in registry offices, documentation systems, and local bureaucracies. Their role is especially important where exclusion affects poor, rural, minority, or displaced populations that are unlikely to reach higher courts quickly.

UNHCR has a distinct role in this framework. The attached handbook states that UNHCR is the UN agency tasked with helping to reduce statelessness and assisting stateless individuals in securing an effective nationality. It also explains that UNHCR is available to advise States on how to create and implement procedures under the 1954 Convention and that the General Assembly requested UNHCR to perform the role foreseen in the 1961 Convention for assisting persons presenting nationality claims (UNHCR and IPU, 2005).

The practical lesson is straightforward. Implementation of the Right to Nationality depends on much more than formal treaty adherence. It requires legislation designed to prevent foreseeable gaps, administrative systems capable of delivering status in real cases, and institutions strong enough to detect and correct bureaucratic exclusion before it hardens into statelessness.

11. Current Pressure Points

11.1 Citizenship stripping and counter-terrorism

Citizenship stripping has become one of the main contemporary battlegrounds in the law of nationality. The central legal issue is not simply whether domestic legislation authorizes deprivation on security grounds. The real question is whether such measures survive the full prohibition of arbitrariness. That requires more than formal legality. It requires a lawful basis, a legitimate aim, strict necessity, proportionality, non-discrimination, procedural fairness, and close attention to the risk of statelessness (Ní Aoláin, 2022; UN Human Rights Council, 2013).

The modern security cases differ from classic fraud cases. Fraud-based deprivation is usually presented as a correction of an unlawfully obtained status. Counter-terrorism deprivation is different. It often targets later conduct, alleged disloyalty, or association with hostile activity. In that setting, nationality law starts to function as an instrument of punishment, exclusion, or risk management. That shift is legally significant because nationality is not supposed to be a disposable administrative benefit that the State withdraws whenever criminal law, prosecution, or repatriation becomes politically inconvenient (Ní Aoláin, 2022).

Security-based deprivation also raises a structural rule-of-law problem. It can externalize security burdens by exporting responsibility to another State, or by leaving the person in legal limbo outside any stable framework of protection. In practice, this may convert nationality law into a tool for removing difficult cases from the ordinary legal order rather than resolving them through prosecution, trial, rehabilitation, or supervised return. That is one reason the UN Special Rapporteur has described citizenship stripping in the counter-terrorism context as a regressive trend with serious human rights consequences (Ní Aoláin, 2022).

Recent UN reporting also shows that deprivation is not confined to terrorism in the narrow sense. In 2025, UN experts described arbitrary denationalization in Nicaragua as part of a broader pattern of repression, forced expulsions, and destruction of legal identity. That example matters because it shows how quickly deprivation powers can move beyond exceptional security rhetoric and become instruments of political exclusion (OHCHR, 2025a; OHCHR, 2025b).

11.2 Legal identity and documentation gaps

The absence of reliable civil registration and identity systems continues to reproduce statelessness. Birth registration does not itself create nationality, but it provides the evidence through which nationality can later be established. Without a birth certificate, it is much harder to prove place of birth, parentage, age, and continuous presence. Those facts are often decisive in nationality claims, especially for children, minorities, displaced persons, refugees, and cross-border communities (UNHCR, n.d.; UNICEF, 2024).

This problem is especially acute for groups already at the margins of the State. UNHCR has noted that the risk of statelessness is especially high for persons without birth certificates who belong to minority groups, cross-border populations, or families with insecure legal status. UNICEF and UNHCR materials also show that civil registration barriers are often not accidental. They are produced by outdated laws, fragmented procedures, excessive documentation demands, and the concentration of services far from rural or marginalized communities (UNHCR, 2024a; UNICEF, 2025a).

The legal identity agenda under Sustainable Development Goal 16.9 remains important for this reason. UNHCR’s registration guidance treats SDG 16.9 as central in the identity management context, and recent UNICEF materials continue to describe birth certificates as the basis on which children establish legal identity and reduce the risk of statelessness. The pressure point is not only legal recognition in theory. It is the administrative capacity to generate and preserve proof before exclusion hardens into long-term legal invisibility (UNHCR, n.d.; UNICEF, 2025b).

11.3 The post-2024 reform agenda

The current implementation agenda has moved beyond the 2014–2024 Global Action Plan to End Statelessness. On 2 October 2024, UNHCR issued the Global Action Plan to End Statelessness 2.0, describing it as an updated framework developed after review of the earlier plan and consultation with key stakeholders. UNHCR states that the new plan sets out 11 priority actions for States and other actors to resolve existing situations and prevent new cases of statelessness (UNHCR, 2024b).

This updated agenda is being pursued alongside the Global Alliance to End Statelessness, launched in October 2024. UNHCR has presented the Alliance as a multi-stakeholder platform designed to accelerate implementation of pledges and coordinated action. In UNHCR’s 2024 global trends reporting, the Alliance was described as encompassing 141 States and numerous other entities by May 2025. That matters because the post-2024 strategy is not just a continuation of treaty doctrine. It is an effort to convert accumulated norms into measurable implementation through broader institutional coordination (UNHCR, 2024c; UNHCR, 2025a).

Substantively, the reform agenda still centers on the issues that have driven the field for years: equal nationality rights, reliable birth registration, issuance of nationality documentation, protection of stateless persons, and reduction of childhood statelessness. What has changed is the framing. The emphasis is now less on a single campaign endpoint and more on sustained implementation, partnerships, data, and system reform. That is a more realistic approach. Statelessness is rarely solved by one statute alone. It is reduced through coordinated reform of nationality law, civil registration, documentation, and administrative practice (UNHCR, 2024b; UNHCR, 2025b).

Conclusion

The core result of this article is clear. In contemporary international law, nationality is no longer a purely domestic matter left to unreviewable State discretion. At the same time, it has not become a fully autonomous supranational status detached from the State. The legal structure is intermediate. States still decide who their nationals are, but they do so under increasingly dense constraints drawn from human rights law, anti-discrimination norms, child protection, the law of statelessness, and procedural legality (Edwards and Van Waas, 2014; Klabbers, 2024).

That intermediate structure explains the modern law of nationality better than either of the older extremes. The sovereignty-first model is no longer sufficient because international law now limits arbitrary deprivation, requires safeguards for children who would otherwise be stateless, condemns discriminatory exclusion, and subjects nationality decisions to procedural review (UDHR, 1948, art. 15; ICCPR, 1966, art. 24(3); CRC, 1989, arts. 7–8; Convention on the Reduction of Statelessness, 1961). A fully supranational account is also inaccurate because nationality remains, in institutional terms, a status allocated through domestic law and administration rather than by a universal citizenship regime.

The doctrinal development of the Right to Nationality also shows that the field cannot be reduced to a single provision or one treaty. It is a composite legal guarantee. It includes access to nationality in defined circumstances, protection against arbitrary deprivation, equality in acquisition and transmission, safeguards at birth, and effective procedures where nationality is denied, contested, or withdrawn (CEDAW, 1979, art. 9; European Convention on Nationality, 1997; African Charter on the Rights and Welfare of the Child, 1990, art. 6). The law’s complexity reflects the reality that nationality problems do not arise in only one form.

For that reason, the hardest cases are not limited to the total absence of nationality. Many of the most serious problems arise in situations of denial, erosion, contestation, and proof. A person may have a plausible claim to nationality yet remain excluded because a birth was never registered, a registry was altered, parentage cannot be documented, succession law was applied restrictively, or the administration refuses recognition. In practice, legal invisibility often begins before formal statelessness is declared. That is why the protection of the Right to Nationality requires attention not only to legislative text, but also to documentation systems, administrative procedures, and remedies capable of restoring legal status when it is wrongly withheld (UNHCR and IPU, 2005; African Committee of Experts on the Rights and Welfare of the Child, 2011).

The broader lesson is practical as much as doctrinal. A State does not comply with international law on nationality merely by avoiding overt denationalization. Compliance depends on whether the legal order can identify those at risk, register births, recognize valid claims, prevent avoidable statelessness, and correct exclusion before it hardens into permanent vulnerability. The Right to Nationality now stands as a test of how international law disciplines State power at the point where membership, identity, and human rights meet.

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