By including a per diem amount in the letter, the parties will not have to execute another payoff letter if the termination date. Please accept this as my authorization to issue a payoff statement to.Through an effective date of . A 10 day payoff is crucial to getting your old loans paid off during a refinance. Learn how it works from start to finish. Please provide payoff information for the above referenced mortgage. Also, please provide loan number and per diem interest. It typically details the principal balance, interest due as of that date, per diem, any late fees, etc. Searching for a fillable Mortgage Loan Payoff Letter Template? Use our easy editor for PDF files and fill this form out quickly.