A payoff letter shows the remaining balance on your mortgage, including fees, interest, etc. Learn more about what a payoff quote is and how to request one.Salt Lake City, UT 84165-0250. The process should take a minimum of 30 days to complete. 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. Browse our self-service options and most frequently asked questions, find the nearest branch or ATM, or get in touch with us directly. 1100 East 6600 South, Suite 510 Salt Lake City, UT 84121 Phone: (866) 688-6983 Toll Free Fax: (888) 730-5032 Monday – Friday 8am-5pm MT Closed Weekends