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.Mail. For deposits, loan payments or payoffs, remit to: San Diego County Credit Union Attn: Deposits, Payments or Payoffs P.O. Box 269040. Available Monday - Friday: 9AM - 5PM PDT (877) 228-4873. We want to hear from you. If you're worried about how to get out of debt, here are some things to know — and how to find legitimate help. P.O Box Address: Cabrillo Credit Union PO BOX 261169. Loan Payoff Request correspondence on SSFCU letterhead. Instructions. Fill out online and submit. Building financial confidence to support your dreams.