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. Use a standard business letter format with your name, contact information, and the date at the top. Log in to your account online to make a payment, check your loan balance and more. Our Loan Servicing team is always happy to assist you. Do you have questions? It is a way of consolidating all of your debts into a single loan with one monthly payment. Frequently Asked Questions.