In law, a deposition is sworn testimony a witness gives outside the courtroom during the pretrial discovery phase of a lawsuit, usually in a lawyer’s office, with every question and answer recorded word-for-word by a court reporter. The witness answers under oath, so what a deposition means in law is, in practical terms, trial testimony taken early: it carries the same truth-telling obligation as testimony on the stand, and lying can be prosecuted as perjury. Federal Rule of Civil Procedure 30 governs oral depositions in federal cases, and every state has a parallel rule for its own courts.1Cornell Law School. Federal Rules of Civil Procedure Rule 30 – Depositions by Oral Examination
Why Lawyers Take Depositions
A deposition does several jobs at once. It reveals what a witness knows and how that witness is likely to come across to a jury. It preserves testimony in case the witness can’t appear at trial later. And it locks in a sworn version of events: if the witness tells a different story on the stand, the other side can read the deposition transcript to the jury and expose the inconsistency. That risk alone keeps most witnesses careful, and it is one of the reasons many cases settle after depositions are taken.
Rule 31 also allows depositions by written questions, where lawyers submit their questions in advance and the witness answers on the record without live questioning.2Cornell Law School. Federal Rules of Civil Procedure Rule 31 – Depositions by Written Questions This format is uncommon, because the spontaneous back-and-forth of an oral deposition is what makes the tool useful.
Who Is in the Room
The person answering questions is called the deponent. A deponent may be a party to the lawsuit, an eyewitness, a retained expert, or anyone else with relevant knowledge. Lawyers for every party in the case attend. The attorney who noticed the deposition asks the questions first; opposing attorneys are present to protect their clients and to ask their own.
A court reporter administers the oath and creates the official verbatim transcript, typically on a stenotype machine in real time.3United States Courts. Federal Court Reporting Program A videographer is often there too, capturing audio and video that can later be played at trial if the witness cannot appear in person. Video also records hesitation, tone, and body language that a written transcript cannot.
When a party deposes an opponent’s expert witness, that party generally has to pay the expert a reasonable fee for their time.4Cornell Law School. Federal Rules of Civil Procedure Rule 26 – Duty to Disclose; General Provisions Governing Discovery
How a Deposition Is Scheduled
A deposition is set up on paper before anyone sits down. For a witness who is already a party to the lawsuit, the requesting attorney serves a Notice of Deposition on all parties, stating the date, time, and location. For a witness who is not a party, the attorney must also serve a subpoena under Rule 45 to require the person to appear.5Cornell Law School. Federal Rules of Civil Procedure Rule 45 – Subpoena If the lawyer also wants the witness to bring documents, the subpoena takes the form of a subpoena duces tecum, listing the specific records or items to produce. A witness who ignores a properly served subpoena can be held in contempt by the court where compliance was required.
Federal rules cap each side at ten depositions, counting oral and written depositions together, unless the parties agree to more or the court permits it.1Cornell Law School. Federal Rules of Civil Procedure Rule 30 – Depositions by Oral Examination That limit forces lawyers to pick carefully whom to depose.
What Happens During the Questioning
When everyone is seated, the court reporter places the witness under oath and goes on the record with the case name, date, and names of those present. From that point forward, every word spoken by the witness and the lawyers is being transcribed.
The attorney who requested the deposition conducts direct examination with open-ended questions aimed at drawing out facts. Attorneys for the other parties then follow with cross-examination to challenge, clarify, or fill gaps. The questioning continues until every lawyer has had their turn.
A single deposition is limited to one day of seven hours of actual questioning time under the federal rules.1Cornell Law School. Federal Rules of Civil Procedure Rule 30 – Depositions by Oral Examination Breaks don’t count against that clock, so the calendar day usually runs longer. Courts can extend the limit for complex cases or when someone has stalled to burn time. In large commercial disputes, depositions sometimes span multiple days, each capped at seven hours.
Remote Depositions
A deposition does not have to happen in person. If the parties agree or the court orders it, the testimony can be taken by videoconference or by telephone. For jurisdictional purposes, a remote deposition is treated as happening wherever the witness is sitting, not wherever the lawyers are.
Objections and Refusing to Answer
Objections at a deposition work differently than at trial. Lawyers can and do object to the form of a question (leading, vague, compound, argumentative), to foundation, or to relevance, but the witness almost always has to answer anyway. The objection is preserved on the record, and a judge rules on it later if the testimony is offered at trial.
The narrow exception is an instruction from counsel not to answer. Under the federal rules, that instruction is only proper in three situations: to protect a legal privilege such as attorney-client communications, to enforce a court-imposed limitation on the deposition’s scope, or to allow counsel to seek a court order terminating the deposition.1Cornell Law School. Federal Rules of Civil Procedure Rule 30 – Depositions by Oral Examination Attorney-client privilege shields confidential communications between a client and lawyer, and the related work-product doctrine shields materials prepared in anticipation of litigation, including an attorney’s notes and mental impressions. Both protections can justify refusing to answer, and both can be waived if the confidential material was shared with outsiders.
If a deposition is being used to harass, embarrass, or impose an unreasonable burden, the witness or any party can ask the court for a protective order limiting the topics, restricting who attends, sealing the transcript, or stopping the deposition.4Cornell Law School. Federal Rules of Civil Procedure Rule 26 – Duty to Disclose; General Provisions Governing Discovery A deponent may also move to terminate a deposition mid-session if it is being conducted in bad faith.
Depositions of a Company
When a party wants to depose an organization rather than an individual, Rule 30(b)(6) provides the mechanism. The requesting party serves a notice listing the topics to be covered, and the organization designates one or more people to testify on its behalf. That designated witness does not simply testify about personal knowledge: they speak for the entire organization. The company has an affirmative duty to educate the representative on every noticed topic, which may mean reviewing corporate records and interviewing current and former employees.
If the representative shows up unable to answer questions the organization should reasonably be able to address, courts treat that as a failure to appear and can impose sanctions, draw adverse inferences, or enter default on specific issues. Each designated person counts as a separate deposition toward the seven-hour cap.
Reviewing and Correcting the Transcript
After the deposition ends, the witness has 30 days from being notified the transcript is available to review it.1Cornell Law School. Federal Rules of Civil Procedure Rule 30 – Depositions by Oral Examination Corrections are made on an errata sheet that lists each change with the page and line number and the reason.
Courts disagree about how far an errata sheet can go. Some permit only typographical fixes; others allow substantive changes, even answers that contradict the original testimony. Either way, the original answer stays in the record. Both versions reach the judge or jury, and the opposing side will almost always re-depose the witness about any material change, which can turn the correction into a credibility problem rather than a clean fix.
How Deposition Testimony Is Used Later
A deposition is not just a research tool. The transcript can come back into the case in several ways. The most common use is impeachment: if a witness says something at trial that differs from the deposition, the opposing lawyer reads the conflicting passage to the jury.6Cornell Law School. Federal Rules of Civil Procedure Rule 32 – Using Depositions in Court Proceedings
When the deponent is a party, the opposing side can use the deposition for any purpose at trial, not just impeachment. A party’s own sworn statements are treated as fair game.
If a witness is unavailable at trial, the deposition can be read into the record or played on video in place of live testimony. The federal rules define unavailability broadly: death, location more than 100 miles from the courthouse, illness or infirmity, inability to be reached by subpoena, or exceptional circumstances found by the court. The Federal Rules of Evidence separately allow former testimony of an unavailable declarant as a hearsay exception.7Legal Information Institute. Federal Rules of Evidence Rule 804 – Hearsay Exceptions; Declarant Unavailable
One safeguard limits selective reading. If one side reads only a favorable excerpt, the other side can require additional portions to be read immediately for context under the rule of completeness.8Legal Information Institute. Federal Rules of Evidence Rule 106 – Remainder of or Related Writings or Recorded Statements
Deposition excerpts also drive pretrial motions. Attorneys routinely attach them to motions for summary judgment, asking the court to decide the case without a trial when the sworn record shows no genuine factual dispute.9Cornell Law School. Federal Rules of Civil Procedure Rule 56 – Summary Judgment
Lying Under Oath
Because deposition testimony is given under oath, false statements are perjury. Federal law treats perjury as a felony punishable by a fine, up to five years in prison, or both.10Office of the Law Revision Counsel. 18 USC 1621 – Perjury Generally That is what gives a deposition its weight in the case: it is sworn testimony, and the law treats it that way from the moment the oath is administered.