The mortgage payoff calculator helps you find out. Fill out the form below to request a loan payoff letter.If you have any questions, please contact Loan Customer Service at 1-800-677-6272 option 5, option 2. 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. The online form is quick and easy to use. Be sure to have the loan and borrower information ready when you make your request. Complete the form below to submit your payoff request. U.S. Bank Mobile App: Select Manage at the top of the screen, then choose Request payoff quote. Demand Payoff Request.