Subpoena

A subpoena is a legal order requiring someone to testify, produce evidence, or both. Failure to comply can lead to penalties, subject to legal grounds for challenge or exemption.

Subpoena ad testificandum: A subpoena requiring a person to appear and give testimony. This form compels testimony rather than document production.
Civil procedure: The rules governing how civil lawsuits are initiated, conducted, and resolved. Civil subpoenas operate within procedural rules for obtaining evidence and testimony.
Summons: A formal notice directing a person to respond to a lawsuit or appear in court. A summons generally initiates or advances a case; a subpoena demands testimony or evidence.
Congressional subpoena: A demand for testimony or records issued by a committee or chamber of the United States Congress. Congressional committees use subpoenas to compel evidence during oversight and investigations.
Witness intimidation: Threats or coercion intended to deter or influence a person's participation as a witness. A subpoena compels participation through legal authority rather than unlawful pressure.
Subpoena duces tecum: A subpoena requiring a person to produce specified documents or other evidence. This form targets records or objects that may serve as evidence.
Criminal procedure: The rules governing investigation, prosecution, and adjudication of criminal cases. Criminal proceedings use subpoenas to secure testimony and evidence.
Search warrant: A judicial authorization allowing law enforcement to search specified places or seize specified items. Unlike a subpoena, a warrant authorizes a search or seizure rather than demanding voluntary production.
Trial subpoena: A subpoena requiring a witness to attend a trial or hearing, often to testify. It brings testimony before the court during a proceeding.
Right against self-incrimination: A legal protection against being compelled to provide testimony that could incriminate oneself. It can provide grounds to resist answering particular subpoenaed questions.

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