42The Court notes that the principle which prevails in EU law is that of the unfettered evaluation of evidence, from which it results, first, that, where evidence has been obtained lawfully, its admissibility cannot be contested before the Court and, secondly, that the only relevant criterion for the purpose of assessing the probative value of evidence lawfully adduced relates to its credibility (judgment of 19 December 2013, Siemens v Commission, C‑239/11 P, C‑489/11 P and C‑498/11 P, not published, EU:C:2013:866, paragraph 128).
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