IOU
or I.O.U.
a written acknowledgment of a debt, especially an informal one consisting only of the letters IOU, the sum owed, and the debtor's signature.
Origin of IOU
First recorded in 1610–20; representing
I owe you
British Dictionary definitions for i.o.u.
IOU
noun
a written promise or reminder to pay a debt
Word Origin for IOU
C17: representing
I owe you
Cultural definitions for i.o.u.
IOU
Abbreviation for “I owe you.” An IOU is a written statement of a borrower's obligation to pay a debt.