Here are your options for making a payment on your SDCCU loan. Use SDCCU Easy Pay, ACH, online banking or bill pay, branch, phone or mail.Do you need a loan payoff request form? How do I request a payoff demand? You can make your request when you sign in online or through the Axos app. Edit, sign, and share payoff letter template online. No need to install software, just go to DocHub, and sign up instantly and for free. Mail. For deposits, loan payments or payoffs, remit to: San Diego County Credit Union Attn: Deposits, Payments or Payoffs P.O. Box 269040. How do I get a payoff for one of my Fifth Third loans? Mail. For deposits, loan payments or payoffs, remit to: San Diego County Credit Union Attn: Deposits, Payments or Payoffs P.O. Box 269040.