A copy of each such permit together with a copy of each such detailed statement shall, on the day such permit is issued, be served personally by the consignee, upon the consignor of the destroyed product, or in lieu of such personal service, shall on such day be served by the consignee on the consignor by depositing it in the post office, inclosed in a sealed envelope, postage fully prepaid, addressed to the consignor of the destroyed product at the consignor’s address, if known, or if not known, then to the place where the shipment or consignment of such product originated.