By including a per diem amount in the letter, the parties will not have to execute another payoff letter if the termination date. It typically details the principal balance, interest due as of that date, per diem, any late fees, etc.Please accept this as my authorization to issue a payoff statement to. Through an effective date of . Please provide payoff information for the above referenced mortgage. Also, please provide loan number and per diem interest. The ID of the subject loan's pool mortgage insurance company. Travel and per diem. 2,507. 812. 4,651. 8,000. This document provides an overview of residential foreclosure procedures in Florida. It defines key terms like mortgage and mortgagor.