Manage travel expenses with Chicago's per diem rates. Ramp's calculator helps you comply with GSA regulations and simplifies reimbursement tracking.By including a per diem amount in the letter, the parties will not have to execute another payoff letter if the termination date. Employees are entitled to a daily per diem allowance, as outlined in the. You must provide the account number, the date you want the payoff letter good through, and the property address. Per diem allowance must always be reduced for any meals provided. 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. The first step is to get in touch with your lender or loan servicer. You can find their contact information on your monthly statements.