(6)Beyond the use of forms for requesting and replying to a request for assistance, the procedures for cooperation should allow and facilitate the communication, consultation and interaction between the requesting authority and the requested authority, throughout the process, to ensure an efficient processing of a request for information or assistance. These procedures should also allow competent authorities to provide each other with feedback on the usefulness of the information or assistance received, on the outcome of the case in relation to which the assistance was sought and on any problems encountered in providing such information or assistance.