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.Please accept this as my authorization to issue a payoff statement to. Through an effective date of . To request a payoff quote, please complete the payoff quote form. This form is intended for 3rd parties acting on behalf of Mr. Cooper customers. 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 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.