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.Find out how to record documents such as deeds, mortgages, Military Discharge Papers (DD214), Powers of Attorney, and more. Creating a payoff letter is essential to any loan or mortgage repayment process. Our free templates and this guide can help you get started. Andrew Carnegie was a Scottish-American industrialist and philanthropist. Pro tip: Even if you haven't been taking advantage of the savings, you can recoup 3 prior years with just filling out 1 form.