It lays out each fee and dollar still due before you completely pay off your mortgage. Here's how it works.There are several ways to record a document at the King County Recorder's Office. Filling out this form is straightforward. 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. Request for Mortgage Assistance, or RMA. Form that a borrower must complete to be considered for mortgage loan modification options. How can I request a payoff statement? Contact your servicing bank (where you make your monthly mortgage payments) and request a payoff statement.