What is discovery?

Discovery is the pre-trial exchange of evidence between parties.

Where the word "Discovery" comes from

Discovery grew from the modern civil procedure goal of avoiding surprise at trial. Through written requests, depositions, and document production, each side learns the other's evidence, which encourages settlement and focuses the trial on real disputes.

Why Discovery matters

It levels the playing field and prevents trials by ambush. Discovery also produces the evidence that decides motions for summary judgment, so the process often shapes the case more than the trial itself.

Common confusion about Discovery

Discovery is not unlimited. The rules limit requests to relevant, proportional information, and privileged communications are protected, so a party cannot demand everything or use discovery to harass, and courts will quash abusive requests.

A real-world example of Discovery

In a breach of contract case, the plaintiff requests emails, invoices, and internal memos from the defendant, and the defendant asks the plaintiff for financial records proving damages, both through written discovery requests.

A worked example of Discovery

A former employee sues for wrongful termination. Through discovery, the employer produces performance reviews and termination memos, the employee gives deposition testimony, and both sides exchange expert reports. The employer later moves for summary judgment using the discovered documents, and the court grants it if the employee's evidence is insufficient, showing how discovery supplies the record that decides the case before trial.

How Discovery works in practice

Respond to discovery requests by the deadline and preserve relevant documents early, because failing to produce can lead to sanctions or adverse inferences. Ask targeted, proportional questions rather than broad demands. During discovery, never delete or alter relevant records, because spoliation can destroy the case regardless of the merits. Discovery also includes electronic evidence, so emails, texts, and spreadsheets are all fair game, and courts now expect both sides to handle electronically stored information competently, including reviewing for privilege before production and agreeing on search terms that keep the process efficient and proportional to the stakes. The process is also where cases are won or lost quietly, because the documents produced often decide whether a motion for summary judgment succeeds long before any jury is seated.

DefineLaw editors — plain-English definitions for general reference; not a substitute for advice from a licensed attorney.