A Louisiana Subpoena — Testimony is a legal document issued by the court to require a person to appear before the court and give testimony as a witness. There are two types of Louisiana Subpoena — Testimony: a SubpoenDuckseCecumumSETDT) and a Subpoena Ad Testificandum (SAT). A Subpoena Ducks Cecum orders a person to appear before the court and bring certain documents or objects with them. A Subpoena Ad Testificandum orders a person to appear before the court and give testimony. Both types of Louisiana Subpoena — Testimony are signed by a judge and must be served by a sheriff or other authorized person.