An Arizona Subpoena is an official court order that requires an individual or business to produce documents or appear in court for a legal proceeding. There are two main types of Arizona Subpoenas: Subpoena Ducks Cecum and Subpoena Ad Testificandum. A Subpoena Ducks Cecum is a court order that requires a person or business to produce documents or other tangible items to a court. A Subpoena Ad Testificandum is a court order that requires an individual to appear in court to give testimony in a legal proceeding.