A Pennsylvania Subpoena to Attend And Testify is a court document issued by a court of law in Pennsylvania to require a person to attend a court proceeding or other legal proceeding and to testify under oath. It can also be used to compel a person to produce documents or other tangible evidence for use at a trial or hearing. There are two types of Pennsylvania Subpoena to Attend And Testify: a Subpoena Ducks Cecum, which requires a person to produce documents or other tangible evidence at a trial or hearing, and a Subpoena Ad Testificandum, which requires a person to appear in court to provide testimony. In both cases, the recipient of the subpoena must appear at the specified date and time, and may be subject to legal penalties and fines for failure to comply.