27 CFR 41.165: Action by taxpayer.

Where tobacco products and cigarette papers and tubes which have been imported or brought into the United States are lost (otherwise than by theft) or destroyed, by fire, casualty, or act of God, and the taxpayer desires to file claim for refund of the tax on such articles, he shall, in addition to complying with the requirements of § 41.163, indicate on the claim the nature, date, place, and extent of such loss or destruction. The claim shall be accompanied by such evidence as is necessary to establish to the satisfaction of the appropriate TTB officer that the claim is valid.