The judgment is an answer to a general legal question as to whether Polish law allows the incorporation of foreign birth certificates where parents are of the same sex. The question was prompted by the authorities' refusal to transcribe into Polish law the foreign birth certificate of a child born to two mothers, both of whom are Polish nationals. The applicant argued that since lack of a transcribed birth certificate inhibits her child's access to a Polish passport, it in practice leads to a situation that is identical to statelessness.
The applicant was born in the US, and his birth certificate indicated a Polish national as the father, and an unknown surrogate mother as the mother. Polish authorities refused to confirm the applicant acquired Polish nationality at birth as a child of a Polish parent, because the birth certificate is against the Polish public order, in particular the prohibition of surrogacy. The courts ruled in favour of the applicant, stating that confirmation of his Polish nationality on the basis of the birth certificate does not amount to validation of surrogacy.
The applicant was born in 1974 to an Iranian father and Austrian mother, and by virtue of the laws applicable at the time only acquired Iranian nationality. Austrian nationality was granted to him by a court decision in 1981. He later moved to the US where he wishes to naturalise, and requested permission from Austria to retain Austrian nationality. Such permission, however, can only be granted to nationals by birth. The Court found a violation of the principle of equality of treatment among nationals.
The applicant acquired Austrian nationality in 1995 and renounced her former Turkish nationality in 1996 as a condition for retaining the Austrian nationality. In 2018 the Austrian authorities declared that she has no longer been an Austrian national since 1997 as it appeared that she voluntarily re-acquired her Turkish nationality at that time, which is a ground for automatic loss of Austrian nationality. The Court set aside the determination of loss of Austrian nationality as it did not carry out a proportionality test on the basis of the Tjebbes judgment.
The applicant naturalised in the Netherlands in 2003, but the naturalisation was withdrawn in 2013 when the authorities found out she had a criminal conviction in Belgium in 2000 that she failed to mention in her naturalisation application. The applicant argued that the decision depriving her of her Dutch nationality is disproportionate, among others in light of EU law and Rottmann judgment, in particular due to her becoming stateless as a result, and the difficulties she may face re-acquiring her original Ghanaian nationality. The Court rejected the appeal and upheld the decision denaturalising the applicant.
The applicant was born abroad to two Polish mothers, and acquired Polish nationality on the basis of at least one of his parents being Polish. However, he was unable to access Polish identity documents, for which a transcription of a foreign birth certificate into the Polish legal order is required - the latter being denied as the concept of two mothers contradicts the fundamental principles of Polish legal order. The Court ruled in favour of the applicant, relying heavily on national and international children's rights norms.