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.This service allows clients to conveniently secure accurate and up-to-date payoff information regarding the outstanding balance on their mortgage loans. What is a Payoff Agreement? A payoff agreement is an informal contract in which a creditor agrees to accept the balance of a debt owed as full payment. To speak to the Mortgage Department, call 210-945-3300, select option 3, then option 2. What to do if you're having difficulty making loan payments to BSI Financial. 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. Request a Payoff Statement.