Recent litigation connected to the Cupriak-Trojan case in Poland has sharpened a legal reality that is no longer confined to academic debate. Across the European Union, Member States may be required to recognise same-sex marriages validly concluded in another Member State when that recognition is necessary for the exercise of EU free movement rights.
In practical terms, this can reach deep into the machinery of civil administration. Even in countries where domestic law does not allow same-sex marriage, authorities may still have to accept, register or transcribe a foreign marriage certificate if refusing to do so would undermine rights attached to EU citizenship.
The question is not whether Poland, or any other Member State, must introduce same-sex marriage into its national legal system. The issue is narrower, but highly consequential: can a State refuse to acknowledge the personal status of an EU citizen — in this case, a lawful marriage — when that refusal makes it harder for that citizen to move, reside and build a life elsewhere in the Union?
From legal principle to everyday administration
The Court of Justice of the European Union addressed the issue directly in its Grand Chamber judgment of 25 November 2025 in Case C-713/23, Wojewoda Mazowiecki. The case involved a same-sex couple who had married in Berlin and later sought recognition of their marriage in Poland. Polish authorities refused to transcribe the marriage certificate into the civil register, arguing that national law does not permit same-sex marriage.
The CJEU took a different view. In the context of EU free movement, it held that the Member State of origin must recognise and transcribe the marriage certificate, despite domestic rules excluding same-sex marriage.
That ruling has since moved from principle to practice. On 20 March 2026, Poland’s Supreme Administrative Court applied the CJEU’s reasoning in a way that effectively requires civil registry offices to recognise and transcribe certain foreign same-sex marriage certificates. By May 2026, reports indicated that Warsaw had registered its first same-sex marriage on the basis of these rulings — a sign that administrative implementation had begun.
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For couples, the impact can be immediate. Recognition may secure residence rights for a spouse, reduce uncertainty in dealings with local authorities, and make it easier to use civil-status documents in daily life. A marriage certificate can be essential for residence registration, employment-related benefits, healthcare access, and family procedures linked to legal status.
But the implications should not be overstated. Recognition for EU free movement purposes does not automatically create full equality across every area of national family law. The central aim is to remove obstacles to EU law rights, not to rewrite domestic definitions of marriage wholesale. As a result, couples may still face uneven treatment depending on the legal issue involved — residence documentation may be recognised, while other family-law consequences remain subject to national rules.
Even so, the direction of travel is unmistakable. When refusal to recognise a cross-border same-sex marriage interferes with an EU citizen’s ability to live and move freely within the Union, Member States are increasingly being pushed — by courts, and then by administrative practice — to bring their systems into line with EU law.
