Acceptable payment methods include eCheck and debit card. ProPay will not accept credit card payments.Additional Information. 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. A payoff letter provides instructions on how to pay off a loan with a lump sum before the loan term ends. Learn how payoff letters work. You'll need to request a 10day payoff letter from your current loan servicer, which you may be able to do online. LOAN PAY-OFF REQUEST FORM. This form must be completely filled out and submitted along with all required documents.