By including a per diem amount in the letter, the parties will not have to execute another payoff letter if the termination date. The Payoff Amount and Per Diem Amount quoted herein are effective through December 31, 2020.Please include a per diem amount in the statement. Please email this information to as soon as possible. Per diem rates look-up Allowances for lodging, meal and incidental costs while on official government travel. Searching for a fillable Mortgage Loan Payoff Letter Template? Use our easy editor for PDF files and fill this form out quickly. Dolbeare, the National Low.