A Missouri Subpoena To Testify At A Deposition in A Civil Action is a court order issued by a court in Missouri that requires a witness to appear and give testimony in a deposition. It is typically issued by the court when the witness’s testimony is needed to help a party in a civil action. The Subpoena can be for an individual or a corporation, and it can be issued to compel a witness to appear at a certain time and place to give testimony under oath. There are two main types of Subpoena to Testify at a Deposition in a Civil Action: the Subpoena Ducks Cecum and the Subpoena Ad Testificandum. The Subpoena Ducks Cecum requires the witness to produce documents or tangible items to the court, while the Subpoena Ad Testificandum requires the witness to appear and give testimony. Both types of Subpoenas must be served on the witness according to Missouri law.