Black's Law Dictionary (2nd edition)dictionaries

Debenture

A certificate given by the collector of a port, under the United States customs laws, to the effect that an Importer of merchandise therein named is entitled to a drawback, (q. v„) specifying the amount and time when payable. See Act Cong. March 2, 1799, $ 80

Source: Black’s Law Dictionary 2nd Ed (1910)