simply put a subpoena is a legal document that compels under penalty of law either testimony or the production of documents, records, and other tangible evidence. there are a number of different types of subpoenas duces tecum, depending on the issuing authority. a subpoena duces tecum will identify those records to be produced, usually in a “schedule a” or “schedule b” attached to the subpoena, along with a due date. they normally request what comes under the broad heading of “business records,” such as:    the subpoena will also contain the authority (statute or regulation) under which it is issued, and it will identify the agency that is issuing the subpoena.