"I am writing to request a payoff letter for my loan, account number XXXXXXXX, with a requested payoff date of (date)." Creating a payoff letter is essential to any loan or mortgage repayment process.Our free templates and this guide can help you get started. Create a Loan Payoff Letter online and download it as a PDF or Word document. Customize and print a blank Loan Payoff Letter for free. A payoff letter provides instructions on how to pay off a loan with a lump sum before the loan term ends. Learn how payoff letters work. What is a 10day payoff letter? A 10-day payoff refers to the time it takes for your new lender to pay off your old loans during a refinance.