60As regards the principle of effectiveness, the Court has held that every case in which the question arises whether a national procedural provision makes the application of EU law impossible or excessively difficult must be analysed by reference to the role of that provision in the procedure, its progress and its special features, viewed as a whole, and, where relevant, the principles which lie at the basis of the national legal system, such as the protection of the rights of the defence, the principle of legal certainty and the proper conduct of the proceedings (judgment of 22 April 2021, Profi Credit Slovakia, C‑485/19, EU:C:2021:313, paragraph 53). The Court has held that the need to comply with the principle of effectiveness cannot, however, be stretched so far as to make up fully for the complete inaction on the part of the consumer concerned (judgment of 1 October 2015, ERSTE Bank Hungary, C‑32/14, EU:C:2015:637, paragraph 62).
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