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.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? You'll need to request a 10day payoff letter from your current loan servicer, which you may be able to do online. Demand Payoff Request. Complete the form below to create a new request. If my loan has been paid in full, when will I receive my escrow refund? How long does it take to have automated payments set up on my account?