What Are Interrogatories?

Interrogatories are written questions sent from one party to another during the discovery phase of a lawsuit. In personal injury cases, interrogatories allow each side to gather information under oath before trial. The answers must be truthful, complete, and signed by the responding party.

If you’ve filed — or are defending — a personal injury claim, you will likely encounter interrogatories. They are one of the most common and important discovery tools. In this guide, we’ll explain what interrogatories are, how they work, what kinds of questions they include, and why they matter in injury litigation.

How Do Interrogatories Work in a Personal Injury Case?

Interrogatories are part of the formal discovery process, which occurs after a lawsuit is filed but before trial. Each side has the legal right to request information from the other to prepare their case.

Here’s how the process generally works:

• One party drafts written questions.

• The questions are served on the opposing party.

• The receiving party typically has 30 days to respond.

• Answers must be provided in writing and under oath.

Because responses are sworn statements, they carry legal significance. Providing false or misleading answers can result in penalties or damage to credibility at trial.

Interrogatories help attorneys:

• Clarify disputed facts

• Identify witnesses

• Confirm timelines

• Discover insurance information

• Narrow the issues for trial

Courts often limit the number of interrogatories each party can send. The goal is to encourage focused and relevant questioning.

In short, interrogatories allow both sides to learn the basic facts of the case early in the litigation process.

What Types of Questions Are Asked in Interrogatories?

Interrogatories in personal injury cases typically focus on liability, damages, and background information. While each case is unique, certain categories of questions are common.

Examples of interrogatory topics include:

• How the accident occurred

• The injuries claimed

• Medical treatment received

• Prior injuries or medical conditions

• Lost wages or employment history

• Names and contact information of witnesses

• Insurance coverage details

For example, a plaintiff may be asked:

• Describe in detail how the accident happened.

• Identify all healthcare providers who treated you.

• State the total amount of medical expenses incurred.

• Explain any pre-existing medical conditions.

Similarly, a defendant may be asked:

• State your version of how the incident occurred.

• Identify any surveillance or video evidence.

• Provide information about insurance policies.

Key characteristics of interrogatories:

• They are written questions only.

• Answers must be specific and complete.

• Objections may be raised if questions are improper.

• Responses can be used at trial.

Because interrogatories often require detailed factual responses, careful preparation is essential.

Are You Required to Answer Interrogatories?

Yes — if properly served, interrogatories must be answered unless there is a valid legal objection. Ignoring them can lead to serious consequences.

If a party fails to respond:

• The opposing side may file a motion to compel.

• The court may order compliance.

• Sanctions may be imposed.

• Claims or defenses could be limited.

However, not all questions must be answered without challenge. Attorneys may object to interrogatories that are:

• Irrelevant

• Overly broad

• Privileged

• Harassing

• Unduly burdensome

Even when objections are raised, partial responses may still be required.

Because answers are given under oath, honesty is critical. Inconsistent or inaccurate responses can be used to challenge credibility during depositions or trial.

Working with an experienced attorney ensures that responses are accurate, strategic, and legally appropriate.

How Are Interrogatories Different From Depositions?

Interrogatories and depositions are both discovery tools, but they function differently.

Interrogatories:

• Are written questions

• Require written answers

• Are answered at a party’s convenience within a deadline

• Do not involve live questioning

Depositions:

• Involve in-person or virtual testimony

• Are conducted under oath

• Allow attorneys to ask follow-up questions

• Are recorded by a court reporter

Key differences include:

• Interrogatories are more structured and limited.

• Depositions allow spontaneous follow-up questioning.

• Interrogatory answers are typically shorter.

• Depositions may last several hours.

Interrogatories often serve as a foundation for depositions. Attorneys review written answers and use them to guide live questioning later.

Both tools are essential to building a strong personal injury case.

How Do Interrogatories Impact Settlement and Trial?

Interrogatories can significantly influence the direction of a personal injury case. Because they clarify key facts early, they often shape settlement negotiations.

Well-prepared interrogatory responses can:

• Strengthen your credibility

• Clarify the extent of injuries

• Identify weaknesses in the opposing party’s case

• Narrow disputed issues

Conversely, incomplete or inconsistent answers may:

• Undermine your claim

• Reduce settlement leverage

• Provide grounds for impeachment at trial

Interrogatories also lock parties into specific factual positions. Changing answers later may raise questions about reliability.

In many cases, the information obtained through interrogatories encourages settlement by:

• Reducing uncertainty

• Confirming liability evidence

• Establishing damages documentation

If the case proceeds to trial, interrogatory responses may be introduced to challenge inconsistencies or support testimony.

For these reasons, answering interrogatories carefully and thoughtfully is critical to protecting your case.

Conclusion

Interrogatories are written questions exchanged during the discovery phase of a personal injury lawsuit. They allow each side to gather information under oath, clarify facts, and prepare for trial or settlement.

Although they may seem routine, interrogatories play a powerful role in shaping a case. Responses must be accurate, complete, and carefully considered, as they can directly impact credibility and compensation.

If you receive interrogatories in a personal injury case, consulting with an experienced attorney can help ensure your answers are legally sound and strategically effective.