2.Where the Office receives an application from the applicant directly or via a national agency or sub-office, it shall, without prejudice to other provisions, mark the documents making up the application with a file number and the date of receipt at the Office and issue a confirmation of receipt to the applicant. That confirmation shall include the file number of the Office, the nature and the number of documents received, the date of receipt at the Office and the date of application within the meaning of Article 51 of the basic Regulation. A copy of the confirmation of receipt shall be transmitted to the national agency or sub-office via which the Office has received the application.