A Pennsylvania AO-88 Civil Subpoena is a legal document issued by the court that requires a person to appear in court or produce documents or other materials related to a civil case. There are two types of Pennsylvania AO-88 Civil Subpoenas: a Subpoena for Testimony and a Subpoena for Production of Documents. A Subpoena for Testimony requires a person to appear in court and provide testimony. A Subpoena for Production of Documents requires a person to produce documents or other materials related to a civil case. Both kinds of Subpoenas must be served in accordance with the rules of the court, and failure to comply with the Subpoena may result in civil or criminal penalties.