Judgment_paragraph 13 · Knauf Gips KG v European Commission (C-407/08 P)

13In that regard, it is settled case-law that the failure to communicate a document constitutes a breach of the rights of the defence only if the undertaking concerned shows, first, that the Commission relied on that document to support its objection concerning the existence of an infringement and, second, that the objection could be proved only by reference to that document. If there were other documentary evidence of which the parties were aware during the administrative procedure that specifically supported the Commission’s findings, the fact that an incriminating document not communicated to the person concerned was inadmissible as evidence would not affect the validity of the objections upheld in the contested decision. It is thus for the undertaking concerned to show that the result at which the Commission arrived in its decision would have been different if a document which was not communicated to that undertaking and on which the Commission relied to make a finding of infringement against it had to be disallowed as evidence (Joined Cases C-204/00 P, C-205/00 P, C-211/00 P, C-213/00 P, C-217/00 P and C-219/00 P Aalborg Portland and Others v Commission [2004] ECR I-123, paragraphs 71 to 73).