Judgment_paragraph 42 · Criminal proceedings against Ömer Altun and Others (C-359/16)

42It should, however, be noted that it follows from the principle of sincere cooperation that any institution of a Member State must carry out a diligent examination of the application of its own social security system. It also follows from that principle that the institutions of the other Member States are entitled to expect the institution of the Member State concerned to fulfil that obligation (see, by analogy, judgment of 3 March 2016, Commission v Malta, C‑12/14, EU:C:2016:135, paragraph 37).