If, at the conclusion of the appropriate proceedings, seized property is to be returned to the owner or consignee, the Solicitor or Service shall issue a letter or other document authorizing its return. This letter or other document shall be delivered personally or sent by registered or certified mail, return receipt requested, and shall identify the owner or consignee, the seized property, and, if appropriate, the bailee of the seized property. It shall also provide that upon presentation of the letter or other document and proper identification, and the signing of a receipt provided by the Service, the seized property is authorized to be released, provided it is properly marked in accordance with applicable State or Federal requirements.