On 3 March 2015, Advocate General Szpunar delivered its opinion in the case C-681/13 (Diago Brands BV) concerning the interpretation of Art. 34 para. 1 of Regulation (EC) No. 44/2001 (former Regulation (EU) No. 1215/2012), in a case where recognition of a judgment of one Member State is sought in another Member State. In his Opinion, the Advocate General held that the mere fact that a judgment given in the State of origin is contrary to EU law does not justify the refusal of the recognition of this judgment on public policy grounds in the State in which recognition is sought. According to his Opinion, a mere error of national or EU law cannot justify refusal of recognition as long as it does not constitute a manifest breach of an essential rule of law in the State in which recognition is sought.
The full text of the Opinion can be accessed here.