Our mobile and web services allow you to obtain real time account information, deposit checks, pay bills, transfer funds, purchase on the go, and more. We offer competitive rates and flexible terms.How to fill out the Payoff Request Letter Templates? 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. The easiest way to pay off your auto loan is through Online Banking. Login to your account and click "Payoff amount" for the loan you would like to payoff.