Our mobile and web services allow you to obtain real time account information, deposit checks, pay bills, transfer funds, purchase on the go, and more. The mortgage payoff calculator helps you find out.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. That's why I am pleased to support this Washington Foreclosure Prevention Resource Guide. 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.