I forgot my user name. How do I retrieve it? Please contact 3Rivers at 800.825.3641 option 1 for assistance. Have more questions? Submit a request 0 Comments Article is closed for comments. Related articles What are my sign-on ID and password for the new mobile app? Can I reset my password through the app? I forgot my password for Mobile Banking. How can I reset it? How do I view my accounts? What is 3Rivers routing number?