How do I justify a date range limitation in discovery when opposing counsel demands the full custodial history?

A date range limitation is defensible when it is grounded in the two pillars of US civil discovery scope: relevance and proportionality. Opposing counsel may demand a custodian’s entire history, but discovery is not unlimited. The burden is to show that the range you propose captures what is relevant to the claims and defenses while excluding material that adds cost without meaningful value.

Anchor the range to the facts of the case

Tie the start and end dates to events in the dispute, not to convenience. Useful anchors include:

• The date the relevant conduct, relationship, or transaction began
• Key triggering events (a contract signing, a complaint, a termination)
• The point at which a preservation duty or litigation hold attached
• A reasonable closing date after the operative events concluded

A range that maps cleanly to the timeline of the allegations is far easier to defend than one that looks arbitrary.

Frame it as proportionality, not concealment

Under the Federal Rules of Civil Procedure, discovery must be proportional to the needs of the case. Build a record that addresses the proportionality factors: the importance of the issues, the amount in controversy, the parties’ relative access to information, resources, the importance of the discovery in resolving the issues, and whether the burden outweighs the likely benefit. Document review volume, cost estimates, and the diminishing relevance of older material support a narrower window.

Negotiate, document, and stay flexible

Raise scope early, ideally during the parties’ discovery-planning conference, and memorialize agreements in writing. Explain why material outside the range is unlikely to be relevant rather than simply refusing it. If opposing counsel identifies a specific, justified need for earlier or later data, be prepared to extend the range for targeted topics or custodians. Cooperation strengthens your position if a dispute reaches the court.

Important caveats

Rules and case law vary by jurisdiction. State courts, administrative bodies, and other countries apply different standards, and a court may ultimately order a broader range. Always confirm the controlling rules and consult qualified counsel for a specific matter.

For related background, see e-discovery topics.