An Austrian national by birth transferred his residence to Germany and naturalised as a German national. The naturalisation in Germany had the effect, in accordance with Austrian law, of causing him to lose his Austrian nationality. The German authorities later withdrew the naturalisation with retroactive effect, on the grounds that the applicant had not disclosed that he was the subject of a criminal investigation in Austria on account of suspected serious fraud, and that he had thus obtained German nationality by deception. The Court held that it is not contrary to EU law for a Member State to withdraw nationality obtained by deception, even if it results in losing EU citizenship, so long as the decision observes the principle of proportionality. Observance of the principle of proportionality requires the person concerned to be afforded a reasonable period of time in order to try to recover the nationality of their Member State of origin.
The applicant is a Palestinian from Syria, who holds a refugee status in Hungary. He also applied for a recognition as a stateless person in Luxembourg. The Court found that the 1954 Statelessness Convention was conceived as complementary to the Refugee Convention. Since the applicant as a refugee in Hungary received at least as good a protection as a Palestinian in an UNRWA protected territory, the latter category being explicitly excluded from the protection scope of the 1954 Convention, the applicant did not qualify for the recognition of a statelessness status in Luxembourg.
The applicant received asylum status as a stateless Palestinian, but his request to register his statelessness in the municipal civil records was rejected due to lack of evidence. He has an original UNRWA document and an ID from Lebanon, but they were considered insufficient proof of identity as well as of statelessness. The applicant complained that inability to affirm his statelessness violates his identity rights under article 8 ECHR, as well as his rights as a stateless person under EU law, both of which arguments didn't succeed.