On 10 December 2018, the Court of Justice (CJEU) delivered the Wightman judgment and recognized the unilateral revocability of the notification ex Art. 50 Treaty on European Union (TEU). This article offers a critical analysis of the decision by insisting above all on the national background of the ruling and the political risks stemming from the decision. The article is structured as follows. Firstly, it analyses the legal questions of the Scottish case, which constituted the ground for the admissibility of the preliminary ruling and showed the perils for the exercise of national sovereign rights embedded in the lack of clarity on revocation options. It thus reconstructs the critical aspects of the preliminary ruling of the CJEU. Subsequently, the article examines the implications of the ruling for the EU legal order. On the one hand, the analysis considers the conception of the EU membership by comparing the approach of the CJEU and that of Advocate General Campos Sánchez Bordona in Wightman.