1) Call the mortgage department and request an official principal payoff letter. Please include a per diem amount in the statement.Please email this information to as soon as possible. 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. 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. How to fill out the Payoff Request Letter Templates? The mortgage payoff calculator helps you find out. Experience a FREE, dividend-earning checking account that offers loan discounts, increased savings rates, early direct deposit, and more! One form tells borrowers the remaining principal amount and interest they have to pay to close out the loan.