72First, before taking the contested decision, the Commission provided the applicant with a copy of the letter from the Spanish judicial authorities of 20 October 2005 stating that Spanish officials were not involved in the case of the forged import licences. Moreover, the Commission contends that it is perhaps impossible to obtain information relating to the alleged complicity within the Spanish authorities simply because such facts have not been established. The Commission must accordingly be regarded as claiming that it is not aware of the existence of such information and does not have any document which makes reference thereto. It is clear from the case-law that, where the institution concerned asserts that a particular document to which access has been sought does not exist, there is a presumption that it does not exist. That, none the less, is a simple presumption, which the applicant may rebut in any way by relevant and consistent evidence (see Case T-5/02Tetra Laval v Commission [2002] ECR II-4381, paragraph 95, and Case T-146/04Gorostiaga Atxalandabaso v Parliament [2005] ECR II-5989, paragraph 121). In the present case, the applicant has not adduced such evidence as to the existence of documents which would establish the alleged forging of the import licences in dispute and possible complicity within the Spanish authorities.