Indiana Third-Party Summons is a document issued by the court that requires a third party to appear in court during a trial or hearing. It is typically issued when the defendant in a case cannot be located or is otherwise unavailable. It is the responsibility of the third party to deliver the summons to the defendant, and the third-party may be liable if the defendant fails to appear in court. There are two types of Indiana Third-Party Summons: the Original Summons and the Duplicate Summons. The Original Summons is issued by the court and must be served to the defendant by the third party. The Duplicate Summons is a copy of the Original Summons and is issued to the third party in order to prove that the Original Summons was served to the defendant.