When you are injured by another person, whether it’s because of a fall on another person’s property or because you were injured in a car accident, suing a person means that your lawyer files a lawsuit in court. To begin a lawsuit, a complaint is filed and served on the defendant. This document tells the defendant and his insurance company what happened and why he is being sued. After the complaint is filed, the defendant’s insurance company will assign a lawyer to answer the complaint. This initial exchange of documents begins the “discovery” phase of the lawsuit.