Yesterday, in the judgment of Shipov, the Court of Justice decided how EU citizenship can shape the recognition of gender identity within the Member States. Yet not through anti-discrimination law, but through the constitutional logic of free movement. The Court of Justice held that EU law precludes national legislation preventing a Union citizen from changing gender-related data in civil-status records in relation to the exercise of free movement. While formally grounded in Article 21 TFEU and Directive 2004/38, the case raises broader constitutional questions about the evolving relationship between citizenship, gender identity, and fundamental rights in the EU. Shipov follows the AG’s “minimal intrusion” logic and reinforces its reasoning by drawing heavily on Strasbourg jurisprudence. Finally, by linking gender identity to the effectiveness of EU citizenship, even under a relatively modest cross-border link, the Court further expands the role of Union citizenship as a vehicle for protecting personal identity and dignity.

Identity documents and the logic of free movement

The judgement of the Court of Justice in Shipov (C-43/24, 2026), issued on 12 March 2026, marks another step in the gradual constitutionalisation of sexual and gender identity within EU law. The Court held that EU law precludes national legislation preventing the amendment of gender-related data – including name and personal identification number – in civil-status registers of a Union citizen who has exercised free movement. In doing so, the Court treated identity documents not merely as administrative instruments but as essential legal tools enabling the effective exercise of EU citizenship rights. If the information contained in such documents no longer corresponds to a person’s lived identity, the resulting inconsistencies may create concrete obstacles in everyday cross-border interactions, ranging from border checks to employment procedures.

The decision continues a line of cases where the Court linked questions of personal identity to the effectiveness of EU citizenship rights. Earlier judgments such as Garcia Avello (C-148/02, 2003), Grunkin and Paul (C-353/06, 2008), Coman (C-673/16, 2018), and V.M.A. (C-490/20, 2021) similarly treated matters of personal status – names, marriage, or parenthood – as capable of restricting the effective exercise of free movement. Previously, I have commented extensively about the Coman case here on VerfBlog and elsewhere (with Dimitry Kochenov).

At first glance, however, Shipov appears doctrinally unusual. The dispute concerned only Bulgarian civil-status records. Unlike the earlier cases mentioned above, it did not involve the recognition of a legal status already established in another Member State (see para. 40 of the judgment). Yet the case was not entirely internal. The applicant had exercised free movement by residing in Italy, where she underwent hormone therapy and formed a stable relationship with an Italian national. Still, the cross-border element remained comparatively thin. The dispute itself concerned the amendment of Bulgarian civil-status records rather than mutual recognition of a status already created abroad. Furthermore, the domestic legal context was shaped by the Bulgarian Constitutional Court’s interpretative decision of 26 October 2021, which held that the constitutional concept of “sex” must be understood exclusively in a biological sense.

A cautious doctrinal route

In her earlier VerfBlog analysis of the Advocate General’s Opinion, Alina Tryfonidou highlighted the careful doctrinal strategy underlying the case. Rather than imposing a general obligation on Member States to introduce gender recognition procedures, the Advocate General, Jean Richard de la Tour, adopted a more limited approach. EU law requires identity documents to enable the effective exercise of free movement. If those documents cannot reflect a person’s gender identity without amending civil-status records, Member States must allow such amendments where necessary for the exercise of EU citizenship rights.

This “minimal intrusion” logic is reflected in the judgment itself. The Court reiterates that matters of civil status remain within Member State competence. However, Member States must exercise that competence consistently with EU law when national rules affect the practical conditions under which Union citizens exercise their mobility rights (paras 37–39, 47 of the judgment).

The Court further reinforced its reasoning by drawing heavily on Strasbourg jurisprudence. Referring to Article 8 ECHR and the European Court of Human Rights’ case law on gender identity, it emphasised that States must provide accessible procedures for legal gender recognition. Bulgaria had already been criticised in ECtHR judgments such as Y.T. v Bulgaria (2020) and P.H. v Bulgaria (2022) (paras. 49-52 of the judgement).

This reliance on Strasbourg allows the Court to situate its intervention within a broader European human-rights framework rather than presenting it as a purely EU-law innovation.

The shadow of McCarthy

Despite this cautious framing, the judgment still raises questions about the limits of EU citizenship. The relatively weak cross-border element inevitably invites comparison with McCarthy (C-434/09, 2011), where the Court rejected the application of EU law to a purely internal situation.

Formally, Shipov is distinguishable because the applicant had exercised free movement by residing in Italy. Yet the case still pushes EU citizenship into terrain where the cross-border element is more contextual than structural. The Court justifies its intervention by emphasising the role of identity documents as instruments of mobility. Discrepancies between a person’s lived gender identity and official documents may create practical obstacles when interacting with authorities, employers, or service providers across Member States.

Nevertheless, the judgment might have benefited from a clearer explanation of why such a comparatively thin cross-border element suffices. Without such clarification, the decision risks appearing difficult to reconcile with the stricter logic of earlier “purely internal situation” cases. The Court’s reasoning may therefore be understood as subtly recalibrating the threshold for the cross-border element required to trigger EU citizenship protections. Rather than demanding a fully developed cross-border legal status, the Court appears willing to intervene where national rules risk undermining the practical usability of identity documents across Member States. Whether this approach represents a pragmatic evolution of citizenship jurisprudence or a more controversial expansion of EU judicial authority will likely remain a subject of debate.

Why the Court chose citizenship rather than equality

Another striking feature of Shipov is the legal pathway chosen by the Court. The dispute concerns gender identity – an issue that might naturally fall within anti-discrimination law. Yet the Court does not rely on the Framework Equality Directive 2000/78/EC or on the equality provisions of the Treaties. Instead, the judgment relies on Article 21 TFEU (the fundamental right to move and reside freely within the EU), Directive 2004/38/EC (EU Citizens’ Rights Directive), and Article 7 of the Charter of Fundamental Rights of the European Union (respect for private and family life).

This choice is constitutionally significant. Anti-discrimination protection under Article 19 TFEU typically requires legislative harmonisation, whereas free movement provisions operate directly. By framing the case through citizenship and mobility rather than equality law, the Court relies on one of the Union’s strongest constitutional tools.

From market citizenship to sexual citizenship

The broader significance of Shipov becomes clearer when placed within the evolving constitutional narrative of EU citizenship. Over the past two decades, the Court has increasingly relied on citizenship and free movement to address questions of family status and sexual identity, areas traditionally considered matters of national competence.

Shipov extends this logic to gender identity. The case illustrates what I have previously described as the emergence of EU sexual citizenship – a constitutional development in which EU citizenship becomes a vehicle for recognising sexual and gender identities across the Union. Rather than relying primarily on anti-discrimination law or harmonisation under Article 19 TFEU, the Court increasingly uses citizenship as the doctrinal gateway for protecting these identities. From this perspective, EU citizenship increasingly operates not only as a market-based status but also as a normative framework that shapes the recognition of personal identity across Member States. By addressing issues of family status, sexual orientation, and gender identity through the lens of mobility rights, the Court gradually constructs a constitutional space in which certain aspects of personal identity become indirectly protected by EU law.

Conclusion

Technically, Shipov may appear to be a free movement case. In reality, it forms part of a broader constitutional evolution. By linking gender identity to the effectiveness of EU citizenship, the Court further expands the role of Union citizenship as a vehicle for protecting personal identity and dignity. More broadly, the judgment reflects a recurring tension within EU citizenship jurisprudence: while matters of personal status formally remain within the competence of Member States, they increasingly become subject to EU constraints when they affect the practical conditions under which Union citizens exercise their rights of movement and residence. Questions of names, family relations, and now gender identity thus appear less as purely domestic matters and more as elements of the legal infrastructure that allows EU citizenship to function in practice.

Whether this development represents a cautious doctrinal adjustment or a more ambitious constitutional shift remains open to debate. What is clear, however, is that EU citizenship is increasingly shaping the recognition of sexual and gender identities across the Union – even where the cross-border element remains comparatively modest.