Witness my signature and official seal this ______ day of. ,. ______, in the County and State aforesaid. (Signature).Please complete the form below with as much information as possible. Convenience is key at Dade County Federal Credit Union. We have provided all of our forms online for you to view and download as needed. 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. Borrowing doesn't have to be a hassle. Supreme Lending is a full-service mortgage lender with a mission to create the best home financing experience possible. Learn more and contact us today.