The dealer must, within 7 days, notify the lien holder in writing that the vehicle has been traded in. 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.The easiest way to calculate your total loan payoff amount is to go online or call your lender directly. Many lenders have calculators available. OneMain loan specialists in the S Redwood Rd branch in Salt Lake City, UT are here to help with personal loan needs. We offer fast auto financing in Utah, Nevada, Arizona, Idaho, and New Mexico. Auto Loan Payoff Payments. Standard US Mail. ×. We offer fast auto financing in Utah, Nevada, Arizona, Idaho, and New Mexico. Please do not use this form for questions related to a Westlake Auto Loan.