27 C.F.R. § 13.75 Evidence of receipt by TTB.
Title 27 - Alcohol, Tobacco Products and Firearms
If there is a time limit on TTB action that runs from TTB's receipt of a document, the date of receipt may be established by a certified mail receipt or equivalent written acknowledgment secured by a commercial delivery service or by a written acknowledgment of personal delivery. In the absence of proof of receipt, the date the document is logged in by TTB will be considered the date of receipt.
Title 27: Alcohol, Tobacco and Firearms
PART 13—LABELING PROCEEDINGS
Subpart F—Miscellaneous
§ 13.75 Evidence of receipt by TTB.
