1) Call the mortgage department and request an official principal payoff letter. 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. You owe the balance plus whatever interest has accrued since that statement. And there may also be a fee when you pay it off. Depending on your lender, you may have to sign in to an online account, call a helpline, or send a formal letter to start the request process. This mortgage payoff calculator is designed to help you understand the impact of making additional payments on your mortgage. Your attorney or closing agent should order a demand letter (also called a payoff letter) from your lender. The mortgage payoff statement is a document that provides a comprehensive breakdown of the remaining balance on a mortgage. Shonta Clark is a New American Funding mortgage professional who is focused on customer service and offer competitive pricing on home loans.