Delaware COMPLAINT FORM — ADDITIONAL PARTIES is an official legal form used in the state of Delaware. It is used to add additional parties to a complaint being filed in the Delaware Superior Court. The form is used to add an individual as a defendant, a third-party plaintiff, or a third-party defendant. It also allows the plaintiff to list multiple defendants, third-party plaintiffs, and third-party defendants. The form must be signed by the plaintiff or the plaintiff's attorney. The different types of Delaware COMPLAINT FORM — ADDITIONAL PARTIES are: Individual Defendant, Third-Party Plaintiff, and Third-Party Defendant.