Contention interrogatories are written discovery questions that ask the opposing party to explain the factual and legal basis for a claim or defense. Federal Rule of Civil Procedure 33(a)(2) expressly permits them, providing that an interrogatory is not objectionable simply because it asks for an opinion or contention that relates to fact or the application of law to fact.1Cornell Law School. Federal Rules of Civil Procedure Rule 33 – Interrogatories to Parties They are one of the sharpest tools in civil discovery, because they force the other side to commit, in writing and under oath, to what its case actually rests on.
How They Differ From Standard Fact Interrogatories
Ordinary fact interrogatories ask for straightforward information: witness names, dates, the identity of documents. Contention interrogatories go a step further and ask a party to connect those facts to a legal theory. A typical one reads: “State all facts supporting your contention that the defendant breached the contract,” or “Identify every legal theory on which you base your claim for damages.”
The distinction matters because a contention interrogatory forces a position. Instead of just listing what happened, the responding party has to explain why it matters legally. That makes the answers far more revealing than a witness list, and it is also why parties object to them so often.
Strategic Uses in Litigation
The main value of contention interrogatories is narrowing what is actually in dispute. Complaints tend to be broad. A pleading might allege breach of contract, fraud, and negligent misrepresentation without specifying which facts support which theory. Contention interrogatories cut through that ambiguity by forcing the other side to match facts to claims.
On the defense side, they can expose which affirmative defenses a defendant actually intends to pursue and whether those defenses have any factual support. On the plaintiff’s side, they can reveal whether a counterclaim rests on real evidence or on posturing. Either way, the answers often flag claims and defenses that are ripe for summary judgment: a party that cannot articulate the factual basis for a contention will struggle to survive a dispositive motion built on that gap.
The answers also work as deposition preparation. Once you know the opposing party’s stated theory and the specific facts it says support that theory, you can structure deposition questioning around those exact assertions. Every fact the opposing party identifies becomes a thread to pull during testimony.
When to Serve Them
Timing is where contention interrogatories diverge from other discovery tools. Courts generally expect them to be served later in the discovery period, after the parties have developed their theories through documents and depositions. Serving them at the outset almost always draws an objection, and courts are sympathetic to that objection because a party cannot meaningfully describe its contentions before it knows the full factual picture.
Rule 33(a)(2) gives courts explicit authority to defer a response, allowing them to order that a contention interrogatory need not be answered until designated discovery is complete, a pretrial conference is held, or some other specified time.1Cornell Law School. Federal Rules of Civil Procedure Rule 33 – Interrogatories to Parties The deferral is practical. Forcing answers too early produces incomplete responses and triggers repeated supplementation obligations under Rule 26(e), which requires parties to correct or update prior discovery responses when they learn a response is materially incomplete or incorrect.2United States District Court for the Northern District of Illinois. Federal Rules of Civil Procedure Rule 26 – General Provisions Regarding Discovery; Duty of Disclosure
The common practice is to serve contention interrogatories toward the end of fact discovery or shortly before the dispositive-motion deadline. At that point, both sides have enough information to state their contentions with specificity, and the answers will be detailed enough to be useful.
The 25-Interrogatory Limit
Federal courts cap the total number of interrogatories at 25 per party, including all discrete subparts, unless the parties agree otherwise or the court grants leave to exceed that number.1Cornell Law School. Federal Rules of Civil Procedure Rule 33 – Interrogatories to Parties Contention interrogatories count toward that cap like any other interrogatory, so they have to be used deliberately.
Every contention interrogatory served is one fewer fact interrogatory available. Some litigators reserve a block of the 25 specifically for contention questions to be served later, using the rest for factual questions early on. Others negotiate stipulations with opposing counsel to increase the total, which courts will approve when case complexity justifies it. Watch the subpart counting rule as well. A single interrogatory that asks the party to “state all facts, identify all witnesses, and produce all documents” supporting a contention is likely three discrete subparts, not one.
How to Respond
Responses must be in writing, with each interrogatory answered separately and fully. The responding party has 30 days after service to provide answers and any objections, though that deadline can be extended by court order or written agreement.1Cornell Law School. Federal Rules of Civil Procedure Rule 33 – Interrogatories to Parties
Who Signs
The person who actually provides the answers signs them under oath. For an individual party, that is the litigant personally. For a corporation, partnership, or government agency, any officer or agent who furnishes the information signs the verification.1Cornell Law School. Federal Rules of Civil Procedure Rule 33 – Interrogatories to Parties The attorney signs any objections separately, but the sworn answers themselves must come from someone with actual knowledge of the party’s position.
Verification carries real weight for contention interrogatories. The person signing is swearing that the stated contentions and their factual basis are accurate to the best of the party’s knowledge. Careless or incomplete answers become a problem later if they contradict testimony or evidence at trial.
The Business Records Option
Rule 33(d) allows a responding party to point the asking party to business records instead of writing out a full answer, but only when the answer can be derived from those records and the burden of extracting the information is roughly the same for both sides.3United States District Court for the Northern District of Illinois. Federal Rules of Civil Procedure Rule 33 – Interrogatories to Parties The responding party has to identify the specific records with enough detail that the asking party can locate and review them just as easily.
This option rarely works well for contention interrogatories. A question asking for the factual basis of a legal contention calls for analysis and explanation, not raw data, and courts are unlikely to accept a document dump in response. The Rule 33(d) route is better suited to fact interrogatories asking for things like transaction histories or communication logs.
Objecting
Objections are common, but they have to be specific. Rule 33(b)(4) requires the grounds for any objection to be stated with specificity, and any ground not raised in a timely objection is waived unless the court excuses the failure for good cause.1Cornell Law School. Federal Rules of Civil Procedure Rule 33 – Interrogatories to Parties
Common Grounds
- Premature timing. The interrogatory was served too early in discovery for the responding party to have developed its contentions. Courts regularly sustain this objection and defer the response deadline.
- Overbreadth. The interrogatory lacks reasonable limits on time period or subject matter, or asks for “all facts” supporting every claim in the case in a single question.
- Undue burden. Answering would require a disproportionate amount of effort relative to the value of the information sought.
- Privilege. The interrogatory seeks information protected by attorney-client privilege or the work product doctrine, which covers materials prepared in anticipation of litigation. The party still has to answer any non-privileged portions.
Why Boilerplate Backfires
One of the fastest ways to lose credibility with a court is to respond with generic, copy-and-paste objections. Responses like “Objection: overly broad, unduly burdensome, and seeks privileged information,” with no explanation of why a particular interrogatory is burdensome or what privilege applies, are treated as legally meaningless by many federal courts and can amount to a waiver of the objection entirely. Some courts have imposed sanctions on parties and attorneys who rely on boilerplate objections instead of engaging with each question individually. The specificity requirement in Rule 33(b)(4) means you have to explain what makes the interrogatory objectionable in context, not just invoke magic words.1Cornell Law School. Federal Rules of Civil Procedure Rule 33 – Interrogatories to Parties
Sanctions for Not Responding
Ignoring contention interrogatories or refusing to answer after a court orders a response can trigger severe consequences under Federal Rule of Civil Procedure 37. The process typically starts with a motion to compel, and the moving party must first certify that it attempted in good faith to resolve the dispute without court intervention.4Legal Information Institute / Cornell Law School. Federal Rules of Civil Procedure Rule 37 – Failure to Make Disclosures or to Cooperate in Discovery; Sanctions
If a party still fails to comply after a court order, the sanctions escalate quickly:
- Established facts. The court can treat the matters covered by the interrogatory as established in favor of the other side.
- Evidence restrictions. The disobedient party may be barred from supporting or opposing certain claims or defenses, or from introducing specific evidence.
- Pleading strikes. The court can strike all or part of the non-compliant party’s pleadings.
- Case-ending sanctions. In extreme cases, the court can dismiss the action or enter default judgment against the party that refused to comply.
- Contempt. The court can treat the failure as contempt of court.
On top of any of those sanctions, the court is required to order the non-compliant party or its attorney to pay the reasonable expenses and attorney’s fees caused by the failure, unless the failure was substantially justified or a fee award would be unjust.4Legal Information Institute / Cornell Law School. Federal Rules of Civil Procedure Rule 37 – Failure to Make Disclosures or to Cooperate in Discovery; Sanctions That mandatory fee-shifting provision means stonewalling discovery carries a direct financial cost even when the court stops short of the harshest sanctions.
How the Answers Get Used Later
Answers to contention interrogatories are sworn statements, so the opposing party can use them as party admissions. If you stated under oath that your breach-of-contract claim rests on three specific facts, the other side can hold you to those facts at trial or in a summary judgment brief.
Interrogatory answers are not, however, as binding as formal admissions under Rule 36. A matter admitted through a request for admission is conclusively established for the case unless the court allows it to be withdrawn or amended.5Cornell Law School. Federal Rules of Civil Procedure Rule 36 – Requests for Admission Interrogatory answers do not carry that conclusive effect. A party can offer contradictory evidence or explain at trial why an earlier answer was incomplete or has evolved, and courts understand that legal theories develop over the course of litigation. Still, a sharp inconsistency between an interrogatory answer and trial testimony gives opposing counsel powerful cross-examination material, and juries notice when a party’s story changes.
Treat contention interrogatory answers as commitments you may have to live with. Answer them thoroughly and accurately, but do not overcommit to positions you are not confident in. A response phrased as the party’s contention “based on discovery to date” preserves room to refine the theory as new information emerges, without being evasive enough to draw a motion to compel.