Reflections on the scope of “EU res judicata” in the context of Regulation 1215/2012

It is now established in the case law of the Court of Justice of the European Union (CJEU) that the law pursuant to which the effects of a recognised judgment are determined is that of the Member State where the judgment was rendered. In Case C-456/11 (Gothaer), however, the CJEU deviated from this rule and developed an autonomous (EU) concept of res judicata. The potential for this concept to extend to other jurisdictional determinations by Member State courts has therefore created additional layers of complexity in the area of recognition of judgments. This article seeks to shed light on this topic by drawing conclusions from the Court's rationale in Gothaer and considering whether a more broadly applicable autonomous concept of res judicata can be consistent with the general system of Regulation 1215/2012 and the CJEU's previous case law.