Creating a payoff letter is essential to any loan or mortgage repayment process. Our free templates and this guide can help you get started.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. A 10 day payoff is crucial to getting your old loans paid off during a refinance. Learn how it works from start to finish. 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. A Satisfaction of Security Instrument is a document that shows an individual has paid a deed of trust or a mortgage in full. This is an example of a payoff letter used in a syndicated loan transaction.