What Is Discovery?
The pretrial process by which parties in a lawsuit can obtain information and evidence from each other and from third parties. Discovery prevents trial by surprise — both sides must reveal what they know.
Quick Answer
The pretrial process by which parties in a lawsuit can obtain information and evidence from each other and from third parties. Discovery prevents trial by surprise — both sides must reveal what they know.
Full Explanation
Discovery is the pretrial phase of litigation during which parties gather facts, documents, and evidence to support their claims and defenses. In modern American litigation, the philosophy is that both parties should have access to all relevant information before trial — the 'sporting theory' of litigation (where each side hides its cards until trial) was largely abandoned in favor of full disclosure.
The Federal Rules of Civil Procedure provide for several types of discovery. Interrogatories are written questions that the opposing party must answer under oath. Requests for production of documents (or electronically stored information) require the other party to produce relevant files, emails, contracts, and data. Requests for admission ask the opposing party to admit or deny specific facts. Depositions (oral questioning under oath) are covered separately. Independent medical examinations may be ordered when physical or mental condition is at issue.
Parties also have automatic disclosure obligations — they must proactively disclose certain information without being asked, including witness identities and damages calculations.
Discovery disputes are a major feature of modern litigation. Parties often fight over what is 'relevant,' whether documents are protected by attorney-client privilege or work product doctrine, and how much electronic discovery (e-discovery) is proportionate to the case.
In criminal cases, discovery is more limited but constitutionally required — prosecutors must turn over exculpatory evidence (evidence favorable to the defense) under Brady v. Maryland (1963).
Real-World Example
In Enron's collapse, discovery in shareholder litigation produced millions of emails showing what executives knew about the company's finances. Plaintiffs used this evidence to establish fraud. The sheer volume of electronic documents — tens of millions of pages — made e-discovery a critical challenge.
In a divorce case, discovery might involve demanding bank statements, tax returns, business records, and deposing witnesses who know about hidden assets.
Why It Matters for Law Students
Discovery is the backbone of modern civil litigation and consumes a substantial portion of litigation costs. Understanding what is discoverable, what is protected, and how to use discovery strategically is fundamental to civil practice. Discovery rules are a major component of the civil procedure course and bar exam.