An Illinois Subpoena Ducks Cecum is a court order that requires a person or organization to produce documents or other records for use in a legal case. It is often used to obtain evidence from a third party or to compel a witness to appear in court. The Subpoena Ducks Cecum can be issued by a court in any of the 92 counties in Illinois. There are two types of Illinois Subpoena Ducks Cecum: a General Subpoena Ducks Cecum and a Subpoena Ducks Cecum Ad Testificandum. A General Subpoena Ducks Cecum requires the production of documents or other records without requiring the witness to appear in court. A Subpoena Ducks Cecum Ad Testificandum requires both the production of documents and the witness's appearance in court.