A payoff letter provides instructions on how to pay off a loan with a lump sum before the loan term ends. Learn how payoff letters work.All mortgage payoff letters tend to contain similar information, including: • Payoff amount: The amount of money that would satisfy the loan. 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. Mortgage lenders ask for a letter of explanation to better understand your finances when determining whether to approve you for a loan. Warrant payoff letter. A versatile form template designed to facilitate the process of requesting specific information from individuals, organizations, or businesses. Creating a payoff letter is essential to any loan or mortgage repayment process. Our free templates and this guide can help you get started.