Abstract In the Yusuf and Kadi judgments of 21 September 2005, the Court of First Instance endorsed the Community practice of sanctioning individuals blacklisted by the United Nations (UN). It accepted that the Community uses its competence to adopt state sanctions in combination with Article 308 EC to freeze the assets of civil persons, including European citizens. The court also reduced its jurisdiction to a basic scrutiny of whether jus cogens was violated. The Court of First Instance's decisions can be criticised on various grounds. First, the application of these Articles is contrary to the wording of the Treaty and the case-law of the European Court of Justice (ECJ). Further, as a consequence of the Court of First Instance's judgments, decisions of the UN Sanctions Committee become the supreme law within the EU, provided they meet the requirements of jus cogens as defined by the Court of First Instance. In addition, the individual is deprived of all fundamental rights guaranteed under European law.