Print How do I make a payment on my first mortgage? You can make your mortgage payment through RCU Online Banking. How can I set up automatic payments on my RCU first mortgage through RCU Online Banking? How to make a first mortgage payment from an external financial institution in Online Banking. You can make your first mortgage payment by phone at 1 (866) 669-8615 (please have your loan number ready). You can also mail your payment to: Redwood Credit Union PO Box 7168 Pasadena, CA 91109-7168 If you have any questions, please call us at 1 (800) 479-7928. Related Items Why did the format of my first mortgage statement change? Who can I contact to check the status of my mortgage payment? How can I make a loan payment in RCU Online banking? How can I set up e-Statements/go paperless on my RCU first mortgage?