27 CFR § 22.64
Return of permits
April 24, 2020
Following the termination, surrender or revocation of a permit, or the issuance of a new or amended permit, caused by a change, the permittee shall
(a) Obtain and destroy all photocopies of the previous permit from its suppliers, and
(b) Return the original of the permit or obsolete permit to the appropriate TTB officer for cancellation.