government, and required to be attached to mail-matter, and to some other articles subject to duty or excise. a —Stamp acts. In English law. Acts regulating the stamps upon deeds, contracts, agreements, papers in law proceedings, bills and notes, letters, receipts, and other papers.—Stamp duties. Duties imposed upon and raised from stamps upon parthment and paper, and forming a branch of the perpetual revenue of the kingdom. 1 Bl. Comm. 323. fs