How can I update my mailing address? The quickest and easiest way is to sign on to Online Access and click My Profile --> Request --> Address Change. We’ll update our records as soon as possible. Have more questions? Submit a request 0 Comments Article is closed for comments. Related articles Mailing Address What is 3Rivers routing number? How to set the PIN on your Mastercard. How do I wire money to a 3Rivers member? How do I view my accounts?