RE: First national bank of mar 1) Customer Service#: (702) 269-1100 (even better, here's the toll-free #: (877) 825-3242) 2) Collections #: (888) 729-6274 3) Inquiry Adress: First Nat'l Bank of Marin PO Box 98873 Las Vegas, NV 89193 4) Payment Address: First Nat'l Bank of Marin PO Box 80015 Los Angeles, CA 90080-0015