bill of debt

from Bouvier's Law Dictionary, Revised 6th Ed (1856)
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. 
    

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