Oregon Civil Subpoena is a legal document issued by a court or an attorney that requires a witness to appear in court to provide testimony or documentation related to a civil case. The information provided through the Oregon Civil Subpoena can be used to make a decision in the case. There are three types of Oregon Civil Subpoena: Subpoena Ducks Cecum, Subpoena Ad Testificandum, and Subpoena Ad Testificandum. A Subpoena Ducks Cecum is a court order requiring a witness to bring documents or other tangible items to court. A Subpoena Ad Testificandum is a court order requiring a witness to appear in court and testify. A Subpoena Ad Testificandum is a court order requiring a witness to appear in court and answer questions under oath.