The examined contract gathers the requirements established by the article 12 LOPD so that the town council, responsible for the information, entrusts to third one the provision of the service of development of the application ISAD on his account. However, the existence of manifest contradictions about the position that would occupy this third, the role of each of the agents implicated in the supposed treatment makes necessary revise. Likewise, it is necessary to specify the contents of the responsible service and to establish expressly the destruction of the copies of the information that they have become.