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. The Payoff Amount and Per Diem Amount quoted herein are effective through December 31, 2020. Below is a list of effective dates for the Handbook changes: Changes identified in previously published. Searching for a fillable Mortgage Loan Payoff Letter Template? Use our easy editor for PDF files and fill this form out quickly. GSA establishes the maximum CONUS (Continental United States) Per Diem rates for federal travel customers. Determine the per diem profit the licensee would make if it were open for that day. Travel, per diem, and training.