A Subpoena is a document issued by a court or other legal authority that orders a person to appear in court, produce documents, or testify to provide evidence in a matter. There are two types of Subpoena: 1. Subpoena Ducks Cecum: This type of Subpoena orders an individual to appear in court and produce specified documents or records that are needed as evidence in a legal proceeding. 2. Subpoena Ad Testificandum: This type of Subpoena requires a person to appear in court and give testimony as a witness in a legal proceeding.