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.The mortgage payoff calculator helps you find out. How to Complete a Satisfaction of Mortgage (3 steps). Identify the Parties; Fill and Sign; File and Record the Form. 1. Filling out this form is straightforward. Download newest version of Mortgage Payoff Land Contract Form • Customize, fill out, and submit online • Sizable directory of various templates and PDFs. Notarizing your agreement is also recommended. 1. Analyze Family Member. The mortgage payoff calculator helps you find out.