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.Mail the funds to the address listed in the payoff letter. Wire the funds with the wiring instructions. The mortgage payoff calculator helps you find out. Say you have a mortgage and want to know exactly how much you'd need to pay to satisfy the loan. A mortgage payoff letter will tell you that magic number. 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. Do you need a loan payoff request form?