27 CFR §25.104

1. (a)General. Brewer's bonds may be terminated as to liability for future removals or receipts under the following circumstances:
   1. (1)Pursuant to application of the surety as provided in § 25.103;
   2. (2)On approval of a superseding bond as provided in § 25.95;
   3. (3)When a brewer discontinues business as provided in § 25.85; or
   4. (4)When an existing brewer who becomes exempt from bond requirements terminates the bond as provided in § 25.106.
2. (b)Notification. On termination of the surety's liability under a bond, the appropriate TTB officer will notify the principal and sureties.