By including a per diem amount in the letter, the parties will not have to execute another payoff letter if the termination date. 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. Please accept this as my authorization to issue a payoff statement to. Through an effective date of . Please provide payoff information for the above referenced mortgage. Also, please provide loan number and per diem interest. Searching for a fillable Mortgage Loan Payoff Letter Template? Use our easy editor for PDF files and fill this form out quickly. To get a payoff letter, ask your mortgage lender for an official payoff statement and let them know what the projected closing date is.