The Collaborative International Dictionary of English v.0.48:
Duebill \Due"bill`\, n. (Com.) A brief written acknowledgment of a debt, not made payable to order, like a promissory note. --Burrill. [1913 Webster]Bouvier's Law Dictionary, Revised 6th Ed (1856):
DUE-BILL. An acknowledgment of a debt, in writing, is so called. This instrument differs from a promissory note in many particulars; it is not payable to order, nor is it assignable by mere endorsement. See I 0 U; Promissory notes.