By including a per diem amount in the letter, the parties will not have to execute another payoff letter if the termination date. Please include a per diem amount in the statement.Please email this information to as soon as possible. One of the more common required advances is called "per diem interest" or "interest due at closing. Customer: I Check the payoff letter and it does not have a per diem amount. Tier 4 and 6 members of the Board of Education Retirement System (BERS) are eligible for a loan program under the Qualified Pension Plan (QPP). If you're thinking about refinancing your mortgage, use this letter to get it done. An act to extend the time for completing the construction of a bridge across the Mississippi River at or near the city of Prairie du Chien, Wis.