A New York Application For Subpoena is an official legal document issued by a court that requires a person or entity to appear in court, or to produce documents or other items. There are three types of New York Application For Subpoena: a Subpoena Ducks Cecum, a Subpoena Ad Testificandum, and a Subpoena Ad Testificandum and Ducks Cecum. A Subpoena Ducks Cecum is a court document requiring a person or entity to produce documents or other items in their possession. This type of subpoena is commonly used in civil and criminal cases as part of the discovery process. A Subpoena Ad Testificandum is a court document requiring a person to appear in court to testify. This type of subpoena is usually issued in civil and criminal cases to compel testimony from a witness. A Subpoena Ad Testificandum and Ducks Cecum is a court document requiring a person to appear in court to testify and to produce documents or other items in their possession. This type of subpoena is commonly used in civil and criminal cases as part of the discovery process.