1) Call the mortgage department and request an official principal payoff letter. It's a statement that breaks down the payoff figure for the loan assuming no intervening payments, on a future (specified) date.This guide will help you learn mortgage math, allowing you to confidently calculate how much you need to pay off your mortgage. Request for verification of the final payoff amount must be submitted to Fannie Mae at least 10 days before the scheduled Maturity Date. It lays out each fee and dollar still due before you completely pay off your mortgage. Here's how it works. The mortgage payoff statement is a document that provides a comprehensive breakdown of the remaining balance on a mortgage. Explain the situation and ask to speak to someone in management. I have two amortized mortgages; one big and one small. The conditions (interest rate and mortgage length) are exactly the same.