A Pennsylvania Subpoena to Attend and Testify is an official court document that orders a person to appear in court as a witness and to provide testimony in a legal proceeding. The subpoena can be issued by either a party to the lawsuit or by the court itself. The subpoena can require the witness to appear in court, or it can require the witness to provide testimony in another form such as a deposition. There are two types of Pennsylvania Subpoena to Attend and Testify: 1. Subpoena to Appear: This type of subpoena requires the witness to appear in court on a specified date and time to provide testimony. 2. Subpoena to Provide Testimony: This type of subpoena requires the witness to provide testimony on a specified date and time, but does not require the witness to appear in court. This type of subpoena is usually used for depositions.