A New York Subpoena to Testify at a Deposition in a Civil Action is an official document issued by a court in New York state that requires a person to appear and testify at a deposition in a civil action. The purpose of a subpoena is to compel a witness to provide testimony under oath or to provide documents, records, or other materials for use as evidence in a civil action. There are two types of New York Subpoena to Testify at a Deposition in a Civil Action. The first is a Subpoena Ducks Cecum, which requires a witness to provide documents, records, or other items that may be used as evidence in a civil action. The second type is a Subpoena Ad Testificandum, which requires a witness to appear in person and provide testimony under oath. In order to serve a New York Subpoena to Testify at a Deposition in a Civil Action, the document must be properly served on the witness by a process server or by registered or certified mail. After the subpoena has been served, the witness must appear at the designated time and location to provide the requested testimony or documents. Failure to obey a subpoena may result in serious legal consequences, including fines or even imprisonment.