an extra piece of paper added to a bill of exchange to allow indorsements to be made.Collins Dictionary of Law © W.J. Stewart, 2006
ALLONGE, French law. When a bill of exchange, or other paper, is too small to receive the endorsements which are to be made on it, another piece of paper is added to it, and bears the name of allonge. Pard. n. 343; Story on P. N. Sec. 121, 151; Story on Bills, 204. See Rider.