By including a per diem amount in the letter, the parties will not have to execute another payoff letter if the termination date. Please accept this as my authorization to issue a payoff statement to.Through an effective date of . 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. Please process a request for payoff of the above referenced loan and provide the payoff good through along with a per diem. Loan is for Refinance. 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. Depending on your lender, you may have to sign in to an online account, call a helpline, or send a formal letter to start the request process.