What is a "subpoena"?

A subpoena is a legal document that compels an individual to either appear in court as a witness or to produce specific evidence relevant to a legal proceeding. This document serves an essential function within the judicial system, as it ensures that necessary witnesses and evidence are available to support the case being presented in court.

In the context of legal proceedings, complying with a subpoena is mandatory, and failure to do so can result in penalties, including contempt of court. This underscores the importance of the subpoena in facilitating the discovery process and ensuring that justice is served through the presentation of comprehensive and relevant facts.

The other options do not accurately capture the legal significance of a subpoena. A request from the jury to review evidence is not a formal order like a subpoena; informal testimony does not hold the legal weight required in court, and a document summarizing a case does not address the core function of compelling attendance or evidence.