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.Do you need a loan payoff request form? This form is furnished to give you a statement of actual settlement costs. It typically details the principal balance, interest due as of that date, per diem, any late fees, etc. A letter of explanation may be requested to clarify information regarding your financial history. Learn more about how to write a letter of explanation. This form is furnished to give you a statement of actual settlement costs. How to fill out the Mortgage Payoff Statement Request Form? If you are refinancing, the amount of your refinance loan should be the payoff of your current mortgage plus any fees.