By Raphaël MORENON
10 June 2025
The legal principle that no one can be tried or punished twice for the same acts, known as "ne bis in idem", is a fundamental guarantee in our legal system. It protects individuals from being punished twice for the same behaviour. However, its application in the financial markets, particularly in the face of the sanctioning powers of the Autorité des Marchés Financiers (AMF), has undergone a complex evolution with many twists and turns. Understanding this dynamic is essential for anyone faced with an investigation or prosecution, whether administrative or criminal. Our firm has observed that this often subtle interplay can have a decisive impact on the course of proceedings and the defence strategy to be adopted. For an overview of the AMF's powers, our comprehensive guide to the AMF's sanctioning powers provides valuable clarification. Discover our complete reference guide to the AMF...
EN 
FR