By including a per diem amount in the letter, the parties will not have to execute another payoff letter if the termination date. A payoff agreement is an informal contract in which a creditor agrees to accept the balance of a debt owed as full payment.The information reasonably necessary to calculate the payoff amount as of the requested payoff date, including the per diem interest amount; and. (3). List all executive staff and their compensation (other than per diem). In more complex agreements, per diem amounts may be too uncertain to calculate upfront, and may require the Agent to complete a recalculation. The cost of registration and materials, and travel and per diem expenses for up to two (2). Michigan staff per event, not to exceed three (3) events per year. 8 program occurred in the 1980s and 1990s .