The Court of Justice of the European Union ruled Thursday that member states must update identity documents to reflect the gender identity of transgender citizens who transitioned in another member state. The court held that refusal to do so may violate the EU's guarantee of freedom of movement.

The ruling came in a preliminary reference from Bulgaria concerning a national identified under the pseudonym "Shipova." She moved to Italy, underwent social and medical gender transition, and then asked Bulgarian authorities to update her birth certificate. Bulgarian officials refused, relying on national legal interpretations that define sex strictly on biological grounds.

The dispute reached Luxembourg after the Bulgarian Supreme Court of Cassation rejected the possibility of legal gender reassignment for transgender people under domestic law.

What did the court decide?

The CJEU found that discrepancies between a person's lived gender identity and their official identity documents can create practical difficulties during identity checks, travel, and professional activities. Those difficulties, the court said, undermine two EU protections:

• the right to respect for private life under Article 7 of the Charter of Fundamental Rights of the European Union;
• the right to freedom of movement under Article 21 of the Treaty on the Functioning of the European Union.

The court emphasized that national courts must set aside interpretations of domestic law that conflict with binding EU legal principles. It also noted that national courts must ensure domestic rules do not prevent the effective application of EU law.

How did the case arise?

Bulgaria's legal framework sits at the center of the dispute. The country's Supreme Court ruled in 2023 that national law does not permit legal gender changes. The Constitutional Court has also issued interpretations defining sex strictly on biological grounds.

Shipova's request for an updated birth certificate collided directly with that framework. The Bulgarian Supreme Court of Cassation referred the question to the CJEU to determine whether the refusal conflicted with EU law.

Under EU judicial procedure, CJEU rulings are binding on national courts when interpreting EU law. The Bulgarian Supreme Court of Cassation must therefore apply the court's interpretation when it resolves the dispute.

What does the ruling change for practitioners?

The judgment gives civil-rights litigators and EU-law practitioners a direct route to challenge refusals of legal gender recognition in member states with restrictive regimes. Where a client has transitioned in one member state and faces rejection by authorities in another, counsel can now cite a binding CJEU holding that grounds recognition in free movement and private life rather than domestic civil-status rules. National courts hearing similar questions must apply the CJEU's interpretation, and the ruling may influence how member states reconcile domestic civil status laws with EU fundamental rights protections in several countries where legal gender recognition remains restricted or unavailable.

What is the broader legal context?

The court has addressed transgender rights in EU law before. In the 1996 decision P v S and Cornwall County Council, it ruled that discrimination arising from gender reassignment constitutes discrimination based on sex under EU equality law.

Thursday's judgment also follows a 2024 CJEU ruling involving Romania, in which the court determined that authorities violated EU law by refusing to recognize a transgender man's legal transition carried out in the United Kingdom.

Earlier this month, Advocate General Richard de la Tour issued a non-binding opinion advising the court that national authorities should not refuse recognition of gender identity where such refusal interferes with the exercise of EU free movement rights. The Grand Chamber-level outcome aligns with that guidance.

The decision addresses growing tensions between EU rights and domestic laws in member states where legal gender recognition remains restricted. For transgender individuals in those jurisdictions, the ruling opens a path through the courts even where legislatures have not acted, because national judges must disapply conflicting domestic interpretations when EU law guarantees are at stake.