An Indiana Civil Subpoena — Deposition is a legal document issued by a court in the state of Indiana in order to compel a witness to appear before a court and testify in a civil case. This type of subpoena is often used to obtain testimony from people who have information relevant to the case, such as witnesses to an incident or experts in a particular field. There are two types of Indiana Civil Subpoena — Deposition: a SubpoenDuckseCecumum and a Subpoena Ad Testificandum. A Subpoena Ducks Cecum requires a witness to bring certain documents or items to court, while a Subpoena Ad Testificandum requires a witness to appear in court and give testimony under oath.