27 C.F.R. § 19.597
(a) Receipts. A proprietor must maintain daily records of the spirits, wines, and alcoholic flavoring materials received into the processing account for the manufacture of distilled spirits products. Total receipts must be summarized showing the amount of:
(e) Other dispositions. A proprietor must maintain daily records of all other dispositions of spirits, wines and alcoholic flavoring materials, including, but not limited to, records regarding the following:
(6) Losses of spirits, wines and alcoholic flavoring materials.
(26 U.S.C. 5207)