Welcome to the Suffolk County Clerk's Office. At one time or another either directly or indirectly, every resident of Suffolk County deals with our office.Administration "per diem" payment from the cost of nursing home care. By including a per diem amount in the letter, the parties will not have to execute another payoff letter if the termination date. The defendant faxed a payoff statement-- a statement including the mortgage balance, per diem rate, and other charges it was due-- to the mortgagor. 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. Transactions and will purchase the loan once the payoff has been validated. Transactions and will purchase the loan once the payoff has been validated. You mentioned that there was a form that's not being filled out?