Payments can only be made to SCU. How to fill out the Payoff Request Letter Templates?Click on Payments and then click on Request Payoff. Request a payoff quote. 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. Use one of our Quick Links below to manage your account, request assistance, or make a loan payment. If you have questions, call us at 8 66-653-2507. Where do I find my account number? Or, put your savings on auto.