A payoff agreement is an informal contract in which a creditor agrees to accept the balance of a debt owed as full payment. A mortgage payoff letter can come in two forms.One form tells borrowers the remaining principal amount and interest they have to pay to close out the loan. This is an example of a payoff letter used in a syndicated loan transaction. This payoff letter (including the defined terms such as Lenders,. Owner Information: Date: Owner: Co-Owner: SDHC Loan No(s):. The purpose of the letter is to describe why the borrower may not be able to make their mortgage, car loan, or other debt payments. Purchase Contract(s). A loan application (known as a Fannie Mae 1003) is filled out and put into a loan file; Borrower identification (e.g.