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. Edit, sign, and share private mortgage payoff letter template online. No need to install software, just go to DocHub, and sign up instantly and for free. To change the mailing address for real property, please fill out and print the PDF. Create a Loan Payoff Letter online and download it as a PDF or Word document. Customize and print a blank Loan Payoff Letter for free. To change the mailing address for real property, please fill out and print the PDF. Than good, and I want to lay out an example.