HomeLaw & LegalCivil LawWhat is Interrogatory?
Law & Legal·2 min·Updated Mar 15, 2026

What is Interrogatory?

Interrogatory

Quick Answer

An interrogatory is a formal set of written questions used in civil law cases to gather information from the other party. It is part of the discovery process, allowing one party to obtain relevant facts before trial.

Overview

An interrogatory is a legal tool used in civil law to ask the opposing party specific questions that must be answered in writing and under oath. This process is crucial during the discovery phase of a lawsuit, where both sides gather evidence and information to prepare for trial. By submitting interrogatories, a party can clarify facts, uncover details about the other side's case, and identify potential witnesses or documents that may be important for the trial. The way interrogatories work is straightforward. One party sends a list of questions to the other party, who is legally required to respond within a specified timeframe. The answers provided must be truthful and complete, as any false information can lead to legal penalties. For example, in a personal injury case, a plaintiff may send interrogatories to the defendant asking for details about their insurance coverage or any prior incidents similar to the current claim. Interrogatories matter because they help ensure that both parties are on equal footing before the trial begins. They promote transparency and can lead to settlements by clarifying issues or revealing weaknesses in a case. In civil law, using interrogatories effectively can significantly impact the outcome of a case, as they can provide critical insights that shape legal strategies.


Frequently Asked Questions

Interrogatories can include a wide range of questions related to facts, opinions, and evidence relevant to the case. They may ask for details about events, individuals involved, and any documentation that supports the party's claims or defenses.
Typically, a party must respond to interrogatories within 30 days of receiving them, although this timeframe can vary depending on the jurisdiction and specific court rules. It's essential for parties to adhere to these deadlines to avoid potential legal consequences.
Yes, the responses to interrogatories can be used as evidence in court. However, they are generally considered less formal than live testimony, and their admissibility may depend on the context and how they were obtained.