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.Do you need a loan payoff request form? What is a Payoff Agreement? A payoff agreement is an informal contract in which a creditor agrees to accept the balance of a debt owed as full payment. Creating a payoff letter is essential to any loan or mortgage repayment process. Our free templates and this guide can help you get started. This Los Angeles County program gives you a chance to review real estate documents to protect you from fraud and protect your home from a foreclosure. One form tells borrowers the remaining principal amount and interest they have to pay to close out the loan. If you pay the amount on the Notice of Default, the lender cannot sell your home.