To initiate this process, kindly have the authorized borrower complete and submit a payoff authorization form to our loan servicing department. Request a loan extension.Loan Payoff Request correspondence on SSFCU letterhead. Find the most convenient method for you. We have 12 convenient locations in San Antonio, La Vernia, and New Braunfels, Texas. Book an appointment to avoid a wait! Contact Us. Fill out the form below and a banker will contact you soon. Main Line: (210) 736-7600. Jeff Line: (833) JEFF LINE or (833) 533-3546. Main Phone Number - 800.492.