A Subpoena to Testify at a Hearing or Trial in a Criminal Case is a legal document issued by a court or other governmental authority that commands an individual to appear in court to give testimony in a criminal case. There are two main types of Subpoena to Testify at a Hearing or Trial in a Criminal Case: Subpoena Ducks Cecum (SET) and Subpoena Ad Testificandum (SAT). A Subpoena Ducks Cecum is issued to a witness to produce documents or other tangible evidence, such as photographs or recordings. This type of subpoena requires the witness to provide the requested evidence at the hearing or trial. A Subpoena Ad Testificandum is issued to a witness to testify in court. This type of subpoena requires the witness to appear in court and answer questions about the case. The Subpoena to Testify at a Hearing or Trial in a Criminal Case must contain specific information, including the name of the court, the name of the defendant, the date and time of the hearing, and any other information that is necessary for the witness to appear in court. The Subpoena must also be served on the witness at least fifteen days before the hearing or trial. Failure to comply with a Subpoena to Testify at a Hearing or Trial in a Criminal Case can result in a witness being held in contempt of court, which can result in fines or jail time.