Creating a payoff letter is essential to any loan or mortgage repayment process. Our free templates and this guide can help you get started.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 information should be included in my paidinfull letter? 1. Enter your personal information and amount owed. The CFPB complaint database, credit card plan survey and agreement database are good places to start if you are shopping for a credit card. A 10 day payoff is crucial to getting your old loans paid off during a refinance. Learn how it works from start to finish. 1. Enter your personal information and amount owed.