This document provides an overview of the case law of the Court of Justice of the European Union (“CJEU”) regarding the ne bis in idem principle in criminal matters, and explains how this case law has helped shaping the scope and main features of the ne bis in idem principle in the EU legal order. It is aimed at providing guidance in the application of the ne bis in idem principle in a transnational context.

The table of contents and summaries of judgments have been prepared by Eurojust and do not bind the CJEU. They are not exhaustive and are meant to be used only for reference and as a supplementary tool for practitioners.

The text of the judgments of the CJEU can be found in all official languages of the EU at the CJEU’s website.

This document is updated until September 2017.