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 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. Under the Loan Information section, you will find a payoff request option that will take you to our payoff request form. "Payoff amount" is generally higher than the remaining balance on the home. This service allows clients to conveniently secure accurate and up-to-date payoff information regarding the outstanding balance on their mortgage loans. 1) Call the mortgage department and request an official principal payoff letter. First you need to know what the payoff figure is. Say you have a mortgage and want to know exactly how much you'd need to pay to satisfy the loan.