AbstractAs a consequence of the state unity theory, the conduct of all state organs is attributed to the state in an undifferentiated manner. It follows that, in both international and European Union law, state liability can be based on the substance of judicial decisions despite the independence of the judicial branch. However, beyond the matter of attribution, there is a significant divergence between the two legal systems. In international law, the judicial origin of challenged decisions does not influence the application of liability criteria, whereas, in EU law, the liability criteria can be applied to judicial decisions in a tightened manner. This article has the twofold aim of establishing and explaining this difference.