Court name: Court of Justice of the European Union
State: Germany
Date of decision:

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.

Court name: Constitutional Court of Austria (Verfassungsgerichtshof)
State: Austria
Date of decision:

Applicant is a refugee from Vietnam, whose refugee status was withdrawn after a number of criminal convictions, combined with the fact that he made a safe trip to Vietnam. He applied for a travel document for foreigners claiming that he is stateless or at least that his nationality status is unclear. The authorities maintained that he was still a Vietnamese national, but the Court sided with the applicant, insisting that the authorities should have taken more factors into account in considering the applicant's potential statelessness. 

Court name: Gent Court of Appeal
State: Belgium
Date of decision:

The applicant arrived in Belgium in 2000 from Kazakhstan. He claimed to have lost his Kazakh nationality on the basis of a Kazakh law providing for such loss in case of permanent residence abroad for over 3 years without registration at the consulate. The Court studied the relevant Kazakh legislation as well as the implementing Presidential Decree, and found that such loss is not automatic, but requires a decision of a competent authority instead, and therefore the applicant's statelessness was not sufficiently substantiated. 

Court name: UK Supreme Court
Date of decision:

An appeal as to whether the Secretary of State was precluded under the British Nationality Act 1981 from making an order depriving the appellant of British citizenship because to do so would render him stateless.