19 C.F.R. § 190.72
(a) Required export data. Proof of exportation of articles for drawback purposes must establish fully the date and fact of exportation and the identity of the exporter by providing the following summary data as part of a complete claim (see § 190.51) (in addition to providing prior notice of intent to export if applicable):
(b) Supporting documentary evidence. The documents for establishing exportation (which may be records kept in the normal course of business) include, but are not limited to: