South Carolina Subpoena Criminal AO 89 is a court order requiring a witness or party to appear in court to give testimony or provide evidence in a criminal case. This subpoena is issued by a magistrate or court clerk on behalf of the court. There are two types of South Carolina Subpoena Criminal AO 89: Subpoena Ad Testificandum, which requires a witness to appear in court to testify; and Subpoena Ducks Cecum, which requires a witness or party to produce documents and/or other tangible evidence. Both types of subpoenas must be served in accordance with the applicable rules of civil procedure.