The Dispute Over Igor Kolomoisky's Citizenship
The European Court of Human Rights (ECHR) has agreed to hear a case brought by Ukrainian-Israeli businessman Igor Kolomoisky, who is challenging the revocation of his Ukrainian citizenship. This case highlights the complex legal challenges that can arise from changes in nationality law. In July 2022, President Volodymyr Zelenskyy issued Decree No. 502/2022, stripping Kolomoisky of his Ukrainian citizenship on the grounds that he held dual nationality, specifically Israeli citizenship acquired in 1995.
The legal conflict stems from the fact that Ukraine's law prohibiting dual citizenship was enacted in 1997, two years after Kolomoisky obtained his Israeli passport. Following the decree, Kolomoisky appealed to Ukraine's Supreme Court, but the national courts, including the Cassation Administrative Court, upheld the government's decision to revoke his citizenship.
Legal Proceedings and Future Implications
In September 2025, the Grand Chamber of Ukraine's Supreme Court definitively upheld the decree. Notably, two judges of the Grand Chamber, Mykola Mazur and Oleh Kryvenda, published a separate opinion on the matter. The case now moves to the international stage at the ECHR. A new Ukrainian law permitting multiple citizenships came into force in January 2026, a development that may influence the ECHR's consideration of whether Kolomoisky's rights were violated by applying a 1997 law retroactively to his 1995 actions.
The ECHR's review of Igor Kolomoisky's case underscores the significance of citizenship laws, particularly when applied to past events amid evolving legislation. The relevance of this proceeding is heightened by Ukraine's recent adoption of a law on multiple citizenship, which may open new avenues for legal protection in similar situations. A ruling from the European Court could have a substantial impact on Ukraine's legal system and its future handling of citizenship matters.
The ongoing legal battles surrounding Kolomoisky's legal challenges illustrate the intricate relationship between national security and citizenship rights. As the ECHR prepares to examine the implications of Ukraine's evolving citizenship laws, the recent rejection of Kolomoisky's request for an investigation by the Security Service adds another layer of complexity to his case. Understanding these developments is crucial for grasping the broader ramifications for both Kolomoisky and Ukraine's legal landscape.