An Indiana Civil Subpoena — Document is a legal document issued by a court or tribunal requiring a person to appear before it as a witness or to produce documents. This document is typically issued in civil cases and is used to compel a person to give testimony or produce documents that are relevant to the case. There are two types of Indiana Civil Subpoena — Documents: a SubpoenDuckseCecumum which requires a person to produce documents or tangible items and a Subpoena Ad Testificandum which requires a person to appear as a witness and testify.