Swiss court upholds citizenship revocation despite statelessness concerns

Switzerland’s Federal Administrative Court has upheld the removal of Swiss citizenship from a naturalised man convicted in France of supporting terrorism. The ruling allows the State Secretariat for Migration, SEM, to proceed despite the possibility that the decision will leave him without any nationality.

The case involves a 36-year-old man born in Bosnia and Herzegovina who became Swiss as a child. A French court sentenced him five years ago to several years in prison for helping prepare terrorist acts. According to the case summary, he operated propaganda channels for Islamic State and recruited members for the organisation.

After the French judgment, SEM opened separate proceedings in Switzerland in consultation with the authorities in the canton of Aargau. It concluded that his conduct amounted to a serious offence and had caused substantial damage to Switzerland’s reputation.

The decision puts Swiss nationality law under scrutiny because citizenship withdrawal is subject to strict safeguards. Authorities generally require the approval of the canton of origin and must ensure that the person holds another nationality. The court’s acceptance of a statelessness risk gives the case significance beyond the individual circumstances.

The court rejected the man’s claim that denaturalisation amounted to a second punishment for the same conduct. His French prison sentence, the judges held, did not prevent Switzerland from taking an administrative decision on his nationality.

The distinction matters. Criminal courts impose sentences for offences. SEM’s proceedings addressed whether the man could retain Swiss citizenship after conduct that authorities considered gravely damaging to the country. The Federal Administrative Court therefore found that the constitutional protection against double jeopardy did not apply.

The man also argued that citizenship withdrawal would seriously interfere with his private and family life. The judges acknowledged that nationality affects a person’s legal security, residence rights and relationship with the state. They nevertheless found that Switzerland’s security interests carried greater weight in this case.

The ruling also confirms that denaturalisation is not automatic after a foreign terrorism conviction. SEM had to establish compelling grounds and follow the statutory process, including consultation with Aargau. The court then assessed whether the measure was permissible and proportionate. It found that both requirements were met, despite the severe consequences for the applicant and his family.

The man’s voluntary renunciation of Bosnian citizenship became decisive to the court’s assessment of statelessness. He told the court that losing Swiss nationality could leave him without a country of citizenship because he was no longer recognised as Bosnian.

The judges accepted that the risk was real. They also noted that he had renounced his Bosnian nationality while aware that Swiss authorities were already pursuing denaturalisation. In the court’s view, that decision may have been intended to frustrate the Swiss proceedings. This reasoning allowed the judges to treat the potential statelessness as a consequence linked to his own conduct rather than as an unavoidable result of the state’s action.

If the ruling becomes final, it would be the first known case in which Switzerland’s revocation of citizenship leaves a person stateless. That prospect makes the appeal especially important. The Federal Supreme Court could review the interpretation of the safeguards governing nationality loss and the proportionality of the decision.

Swiss law treats citizenship as a protected legal status, particularly for people who acquired it through naturalisation. The judgment signals that the protection can yield when authorities establish serious security concerns and believe the applicant has deliberately undermined the safeguards designed to prevent statelessness.

SEM has revoked the Swiss citizenship of seven dual nationals for supporting terrorism over the past decade. The latest judgment strengthens the agency’s position in cases involving naturalised citizens and national security, while leaving the final legal word to the Federal Supreme Court.

The ruling does not create a general licence to strip citizenship from people convicted abroad. Each case still depends on the conduct, the evidence, the procedural safeguards and the impact on the individual’s private and family life. Here, the alleged activities included running Islamic State propaganda channels and recruiting members, followed by a French conviction for helping prepare terrorist acts.

The case also highlights the role of cantonal authorities in a federal system. SEM acted in consultation with Aargau, the relevant canton in the Swiss proceedings, before ordering the withdrawal. That institutional chain will matter in any future challenge.

For Swiss citizens, the immediate consequence is limited to this individual case. Its broader importance lies in the legal principle under review: whether Switzerland may accept a statelessness risk when a naturalised citizen has voluntarily surrendered another nationality during denaturalisation proceedings. The Federal Supreme Court’s response will determine how far that principle extends.