Contact the Jury Office ; Riverside. Jury Assembly Room 4100 Main Street Riverside, CA 92501.Fill out your jury qualification questionnaire or summons online through the court's eJuror system. If you are assigned to a courtroom for jury selection or serve on a trial, you will continue your service until the trial is completed. Gov (link sends e-mail) Personal Assistance: (213) 894-3644, Monday through Friday, am to I'm Ray, a legal expert here on JustAnswer. I'll do my best to assist you with your post-trial procedures in Riverside Superior Court. Online: Complete the entire form. Verify your name and address are accurate. I sent an email to the court earlier this week explaining my situation, but never got a response back.