BILL OF DEBT, BILL OBLIGATORY, contracts. When a merchant by his writing acknowledges himself in debt to another, in a certain sum to be paid on a certain day and subscribes it at a day and place certain. It may be under seal or not. Com. Dig. Merchant, F 2.

BILL OBLIGATORY. An instrument in common use and too well known to be misunderstood. It is a bond without condition, sometimes called a single bill, and differs in nothing from a promissory note, but the seal which is affixed to it. 2 Serg. & Rawle, 115. See Read's Pleaders' Assistant, 256, for a declaration setting forth such a bill. Also West's Symboleography, s. 100, 101, for the forms both with and without a penalty.