When is a defendant officially involved in a lawsuit?

A defendant is officially involved in a lawsuit when they receive a copy of the complaint. This is a critical moment in the legal process because it marks the formal notification to the defendant that legal action has been initiated against them. The complaint outlines the allegations made by the plaintiff and sets the stage for the defendant's response.

Receiving the complaint is essential as it ensures the defendant is aware of the claims and has the opportunity to defend themselves. This concept is fundamental to the principles of due process, which require that all parties in a legal proceeding be informed about the actions taken against them and be given a chance to respond.

While providing testimony, being arrested, or attending an arraignment may involve a defendant in related legal matters, these actions do not signify their official involvement in the specific lawsuit initiated by the complaint. The act of receiving the complaint is what legally binds the defendant to the proceedings of that particular case.