To sue someone, your first step is to fill out a Complaint and other forms. You'll then file these with the court.Tells the court and the other side that you contend the other side was negligent in some way, and that you were harmed as a result. Be careful to use the form that fits your case and the type of pleading you want to file. A Complaint is a form that says how the person was hurt, who hurt them and how much the damages are. You can find these court forms and more information at the California Courts. In some cases, there is a fill-in-the-blanks Judicial Council form to use; in other cases, you must research and type your Complaint on 28-line pleading paper. The form asks you to provide a clear statement of the problem you are having. In this statement, include important information and relevant dates. By completing the online form, you can provide the details we need to understand what happened.