| a brief written acknowledgment of indebtedness, not payable to order. |

| due bill n. A written acknowledgment of indebtedness to a particular party but not payable to the party's order or transferable by endorsement. |
Due Bill
A financial instrument used to document and identify the seller's obligation to deliver securities sold to the buyer.
Investopedia Commentary
For example, a buyer that purchases a stock ex-dividend, but before the dividend is paid, would provide a due-bill stating that the dividend payment should belong to the seller.
See also: Ex-Dividend
due bill