Entries on the records of receipt and disposition prescribed by §§31.155 and 31.156 must not be erased or obliterated. Correction or deletion of any entry must be accomplished by drawing a line through the entry and inserting an appropriate correction or explanation. If a wholesale dealer in liquors voids an invoice for any reason, the file copy prescribed in §31.181 must be marked “Cancelled” and must be filed as provided in that section; any remaining copy of the voided invoice must be destroyed or similarly cancelled and filed. If a new invoice is prepared, its serial number must be cross referenced on any retained copies of the cancelled invoice.

(26 U.S.C. 5121)