The Vehicle Payoff Sample Letter form is a crucial document for individuals aiming to transfer their vehicle loan to the State Department Federal Credit Union. 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. If you are looking to payoff your vehicle, there is a sample letter form that you can use as a guide. The letter should be professional and informative. First, get a piece of paper and a pencil or pen. Then write your request on the paper. Here's where the payoff request comes in. As the borrower, you will have to contact your lender and ask for a payoff price. It's the same as a payoff letter, but it can be used when you're paying off a loan that involves collateral, such as a home or a car.