Subpoena

What is Subpoena?

A subpoena is a formal, court-backed order that compels a person to testify, produce documents or other evidence, or both. The word comes from Latin for "under penalty," and that is the core idea: if you receive a valid subpoena and ignore it without a legal excuse, you can face penalties, including being held in contempt of court.

A subpoena reaches people who are not parties to a lawsuit, not just the plaintiff and defendant. That is what makes it powerful. It lets a litigant gather testimony and records from witnesses, banks, employers, hospitals, and other third parties who would otherwise have no obligation to get involved. Subpoenas are a central tool of discovery, the pretrial phase where each side gathers evidence.

Types of subpoena

There are two classic categories, usually known by their Latin names:

• Subpoena ad testificandum. This commands a person to appear and give testimony, either at a deposition, a hearing, or trial. "Ad testificandum" means "to testify."
• Subpoena duces tecum. This commands a person to produce documents, records, or tangible things, and sometimes electronically stored information (ESI). "Duces tecum" means "bring with you." A duces tecum subpoena may require you to bring materials to a deposition or, in many courts, simply mail or deliver copies.

A single subpoena can do both at once: order a witness to show up and testify and to bring specified records with them. In U.S. federal court, the subpoena power is governed mainly by Federal Rule of Civil Procedure 45, and a parallel rule exists for criminal cases; most states have their own closely related rules, so the exact form and reach vary by jurisdiction.

How a subpoena works

The mechanics generally follow a predictable path, though the details differ by court:

• Who issues it. In many U.S. courts an attorney of record can issue and sign a subpoena as an officer of the court, without a judge signing it first. Court clerks can also issue them, and a self-represented party usually must ask the clerk or court. The subpoena still carries the court's authority even when a lawyer signs it.
• Service. The subpoena must be formally delivered (served) on the recipient under the applicable rules. Some jurisdictions require personal hand delivery, and witness or mileage fees may need to be tendered at the same time.
• Compliance. The recipient must respond by the date stated: appear to testify, produce the requested materials, or object in the proper way. Producing documents can trigger a duty to preserve them, which connects to any legal hold already in place.
• Enforcement. If the recipient neither complies nor objects, the issuing party can ask the court to enforce the subpoena, and an unjustified refusal can lead to contempt sanctions.

Deadlines, fee requirements, and geographic limits on how far a witness can be compelled to travel all vary by jurisdiction, so the controlling court rules always govern.

Responding: comply, object, or move to quash

If a subpoena is overbroad, seeks privileged material, imposes an undue burden, or was not served properly, you are not simply stuck. You generally have options:

• Comply with the parts that are proper.
• Serve a written objection within the time the rules allow, which can shift the burden back to the requesting party to ask the court to compel.
• File a motion to quash or modify. A motion to quash asks the court to cancel or narrow the subpoena. Courts often quash or limit subpoenas that demand privileged communications, require travel beyond the allowed distance, give too little time, or are unreasonably broad.

Privileged material, such as attorney-client communications, is typically protected, and a subpoena cannot override that protection. The grounds and deadlines for objecting or moving to quash vary by jurisdiction, so check the specific rules and consider counsel before the response date passes.

Subpoena vs. summons

People often confuse a subpoena with a summons, but they do different jobs.

In short, a summons pulls someone into a case as a party, while a subpoena pulls evidence or testimony out of a witness.

Where subpoenas apply

Subpoenas appear across many kinds of proceedings:

• Civil litigation. Compelling a non-party bank, employer, or doctor to produce records, or requiring a witness to sit for a deposition.
• Criminal cases. Both prosecution and defense can subpoena witnesses and documents, subject to constitutional limits.
• Grand jury and administrative investigations. Grand juries and many agencies have their own subpoena power to gather testimony and records.
• Legislative hearings. Legislative bodies can issue subpoenas to compel witnesses and documents.

The facts a witness testifies to, or the records produced, may later be summarized in an affidavit or used to build the evidentiary record.

Why subpoenas matter

A subpoena turns a request into a legal command. Without it, a third party has no obligation to hand over emails, medical files, or financial records, or to sit for questioning. With it, a litigant can reach the evidence that often decides a case, which is why the subpoena power, and the limits on it, vary carefully by jurisdiction.

Responding well matters just as much. A duces tecum subpoena can demand thousands of pages or large volumes of ESI on a tight deadline, and producing the wrong material (or privileged material) can have lasting consequences. For lawyers and paralegals handling that volume, an AI legal assistant like LegesGPT can help review and summarize subpoenaed documents, flag privileged or out-of-scope material, and draft objections or a motion to quash, so you respond accurately and on time.

Frequently asked questions