36According to the Court's case-law, as long as a certified statement issued by an institution of a Member State has not been withdrawn or declared invalid, the competent institution of another Member State must take account of it. However, under the principle of loyal cooperation laid down in Article 10 EC, it is incumbent on the social security institutions correctly to appraise the relevant facts, in particular for the application of the rules concerning determination of the applicable legislation or the rules on aggregation of periods and thus to guarantee the correctness of the information contained in the certified statements. They must therefore reconsider the grounds for the issue of those statements and, if necessary, withdraw them in the event of doubts as to the correctness of the facts on which they are based and, consequently, of the information contained therein (see to that effect Case C-202/97 FTS [2000] ECR I-883, paragraph 56, and Case C-178/97 Banks and Others [2000] ECR I-2005, paragraph 43).
Source: EUR-Lex, © European Union, 1998-2026. Reuse authorised under Decision 2011/833/EU.