Creating a payoff letter is essential to any loan or mortgage repayment process. Our free templates and this guide can help you get started.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. Create a Loan Payoff Letter online and download it as a PDF or Word document. Customize and print a blank Loan Payoff Letter for free. Filling out this form is straightforward. Use a standard business letter format with your name, contact information, and the date at the top. If you receive this form in a small claims case, contact a lawyer. San Francisco, CA 94104.