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.This page contains a list of definitions for common mortgage terms. The Land Records Division is located on the 3rd Floor of the Fairfax County Courthouse at 4110 Chain Bridge Road, Suite 317, Fairfax, VA 22030. Click here to find the form you need to fill out. If you haven`t signed up for your online account yet, click here to get started. Simply complete our short Contact Form to get in touch with our team of lending experts. What is a payoff letter? A payoff letter is a written document from a seller's mortgage company stating the amount of money needed to pay the loan in full. Use our self-service options on this website to pay your taxes or make a phone or video appointment at your convenience.