Summary. This checklist turns the federal rules for answering a complaint into concrete, ordered tasks for the defendant, its lawyer, and the plaintiff's lawyer who has to read the answer. It starts on the day of service with the deadline, waiver, removal, preservation, insurance, and arbitration decisions, then covers the choice between answering and moving under Rule 12. It walks through the three responses Rule 8(b) allows, the Rule 9 matters that require particularity, and the selection and pleading of affirmative defenses, with a separate list of defenses that patent, copyright, and trademark defendants must plead. It then covers counterclaims, crossclaims, and third-party claims, the filing formalities, and the deadlines the answer starts. A plaintiff-side audit, a judgment-on-the-pleadings readiness list, and a default rescue list follow, and the checklist closes with common mistakes, an FAQ, and practical takeaways.

The plaintiff may have spent a year preparing its complaint. The defendant gets 21 days to answer it, and in that window it has to decide what is true, which defenses it will need at summary judgment two years from now, and which of its own claims it must assert now or lose for good. Most answer disasters are not failures of legal analysis. They are a missed box: the venue objection nobody preserved, the jury demand filed on day 15, the counterclaim someone planned to bring "later."

This checklist puts those decisions in the order they arise, with the rule or case behind each one. For the analysis behind the items, read Answering a Federal Complaint: Denials, Affirmative Defenses, Counterclaims, and Judgment on the Pleadings. For a chronological walk-through, use Drafting an Answer and Affirmative Defenses: A Practical Guide. For the forms, use the Responsive Pleading Toolkit: Answer Templates, Affirmative Defense Libraries, and Counterclaim Outlines.

The short answer

  • Calendar the deadline on the day of service. It is 21 days after service, 60 days after a waiver request was sent (90 if sent abroad), or 14 days after the court rules on a Rule 12 motion. Fed. R. Civ. P. 12(a).
  • Use only the three responses Rule 8(b) allows (admit, deny, or lack knowledge or information), and answer everything, because an allegation that is not denied is admitted. Fed. R. Civ. P. 8(b)(6).
  • Plead every affirmative defense, with facts. Rule 8(c) requires it, and two or three sentences of facts per defense end the argument over whether Twombly applies.
  • Preserve personal jurisdiction, venue, process, and service objections in the first filing, or they are gone. Rule 12(h)(1).
  • Plead compulsory counterclaims now, file any third-party complaint within 14 days to avoid needing leave, and serve a jury demand within 14 days after the last pleading on the issue. Rules 13(a), 14(a)(1), 38(b).
  • Plaintiffs: audit the answer within 21 days. That is the window to move to strike defenses under Rule 12(f) and to amend the complaint as of course under Rule 15(a)(1)(B).

How to use this checklist

  • Who uses it: defense counsel and in-house counsel preparing an answer; plaintiff's counsel reviewing one (Part 10 is written for you, and most other items work in reverse as a list of things to look for); and self-represented individuals, who should read Part 1 first. A company cannot use this checklist without a lawyer, because a business entity cannot appear in federal court without counsel.
  • How: give every item one of three marks: done; not applicable, with a one-line reason; or open, with an owner and a target date. The item someone waved off without a reason is usually the one that turns out to matter.
  • Scope: answers in federal district court under the Federal Rules of Civil Procedure. Items that differ in state court or after removal are flagged. Local rules and the assigned judge's standing orders can add requirements, so Part 3 tells you to read them before drafting.
  • Citations: each item cites the governing rule or a representative case. Circuit law varies on several points (the pleading standard for defenses, forgiveness of omitted defenses, the scope of compulsory counterclaims), so confirm the law of your circuit before relying on an out-of-circuit case.

Part 1: Day one: service, deadline, and triage

  • Record exactly how and when each defendant was served (personal delivery, delivery to a registered agent, waiver of service, or a state-law method), and pull the proof of service from the docket.
  • Compute the answer deadline and calendar it with two earlier reminders (for example, day 10 and day 17).
    • 21 days after service, Rule 12(a)(1)(A)(i). When the United States, a federal agency, or a federal officer or employee is sued, 60 days, measured from service on the U.S. attorney or, for an officer sued individually for conduct on the government's behalf, from the later of service on the officer or on the U.S. attorney. Rule 12(a)(2)-(3).
    • Count under Fed. R. Civ. P. 6(a): exclude the day of service, count weekends and holidays, and roll a deadline that lands on a weekend or legal holiday to the next business day. Rule 6(d)'s three extra days do not apply to a complaint served under Rule 4.
  • If a waiver-of-service request arrived, decide whether to sign it within the time the request allows (at least 30 days after it was sent, or 60 if it was sent outside the United States). Rule 4(d)(1)(F).
    • Signing buys a 60-day answer period measured from the date the request was sent (90 days if sent outside any U.S. judicial district). Rule 4(d)(3); Rule 12(a)(1)(A)(ii).
    • Refusing without good cause makes a domestic defendant pay the later costs of service and the fees of any motion to collect them. Rule 4(d)(2).
    • Waiving service does not waive objections to personal jurisdiction or venue. Rule 4(d)(5).
  • If the case was filed in state court, decide whether to remove within 30 days after formal service, and line up the consent of every properly joined and served defendant where the statute requires it. 28 U.S.C. § 1446(b).
  • List every defendant and its service status, and decide whether one answer will be filed for several defendants or separate answers for each. Joint answers save money but must still respond for each defendant where their positions differ.
  • Issue a litigation hold to custodians and IT the same week, covering the documents the complaint puts in issue and the documents your defenses and counterclaims will need. See the Litigation Hold and Evidence Preservation Checklist: A Practical Checklist.
  • Tender the complaint to every insurer and indemnitor in writing, citing the policy or contract notice provision.
  • Run conflicts and confirm the engagement covers the answer, any counterclaims, any third-party claims, and any motion practice.
  • Read the contract behind the dispute for clauses that change the path: arbitration, forum selection, choice of law, notice and cure, contractual limitations periods, jury waivers, and fee-shifting.
  • Search for related proceedings: other lawsuits between the parties, TTAB oppositions or cancellations, inter partes reviews, Copyright Claims Board matters, and arbitrations.
    • A claim already pending in another action when this one began is excepted from the compulsory counterclaim rule. Rule 13(a)(2)(A). A prior judgment may support a preclusion defense (Part 5).
  • Decide whether you need more time, and get it before the deadline in the form the court requires.
  • Confirm who may sign the answer. An individual may appear pro se under 28 U.S.C. § 1654. A corporation, LLC, or partnership "may appear in the federal courts only through licensed counsel." Rowland v. California Men's Colony, 506 U.S. 194 (1993). An answer filed by an owner for the company invites a motion to strike and a default. Self-represented individuals should also see the Self-Represented Litigant Toolkit: Forms, Filings, Hearings, and Collection.

Part 2: Answer now or move first?

  • List every Rule 12(b) defense that is available: lack of subject matter jurisdiction, lack of personal jurisdiction, improper venue, insufficient process, insufficient service of process, failure to state a claim, and failure to join a party under Rule 19. Fed. R. Civ. P. 12(b).
  • Put any personal jurisdiction, venue, process, or service objection in the first Rule 12 motion or in the answer.
  • Weigh a Rule 12(b)(6) motion against answering.
  • If you move against only some counts, get an order or stipulation deferring the whole answer.
  • Reserve a Rule 12(e) motion for a complaint that is truly unanswerable, one "so vague or ambiguous that the party cannot reasonably prepare a response." Rule 12(e). Courts deny these motions when discovery can supply the detail.
  • Decide whether arbitration comes first (Part 1), because a motion to compel is usually filed instead of an answer, not after one.
  • Separate Article III standing from statutory standing. The first is jurisdictional and can be raised at any time; the second asks whether the plaintiff falls within the class Congress authorized to sue, a merits question. Lexmark International, Inc. v. Static Control Components, Inc., 572 U.S. 118 (2014). See the Standing and Justiciability Checklist: A Practical Checklist.
  • If the complaint shows on its face that the claim is time-barred, choose the vehicle: a Rule 12(b)(6) motion now, or a pleaded defense followed by a Rule 12(c) motion. Either works when the dates are pleaded. Jones v. Bock, 549 U.S. 199 (2007).
  • If you move, calendar the 14-day answer deadline that follows the ruling, and start drafting the answer while the motion is pending. Rule 12(a)(4)(A).

Part 3: Investigate before you admit or deny

  • Collect every document the complaint quotes, cites, or attaches. An exhibit attached to a pleading "is a part of the pleading for all purposes." Fed. R. Civ. P. 10(c). Read the whole contract, not the paragraph the plaintiff excerpted.
  • Pull the public records the plaintiff relies on: USPTO registration and prosecution files, Copyright Office registration records and deposit information, patent file histories and assignment records, secretary of state filings, and the dockets of related cases. Pleading "lack of knowledge" about a public record anyone can pull in five minutes is not credible.
  • Interview the people with knowledge and build a working chart with one row per complaint paragraph: the allegation, what is true, the source, the proposed response, and who confirmed it. The toolkit has a template.
  • Confirm the defendant's exact legal name, entity type, state of organization, and principal place of business. A corporation's principal place of business is its "nerve center." Hertz Corp. v. Friend, 559 U.S. 77 (2010).
  • For an LLC, partnership, or trust, trace citizenship through every layer of members before responding to jurisdictional allegations or filing the Rule 7.1(a)(2) disclosure. Unincorporated entities take the citizenship of each member. Carden v. Arkoma Associates, 494 U.S. 185 (1990); Americold Realty Trust v. ConAgra Foods, Inc., 577 U.S. 378 (2016).
  • Build the timeline that limitations and laches defenses will need: first sale or first use, first notice from the plaintiff, registration dates, the date the plaintiff learned of the conduct, and the filing date. See the Statute of Limitations Diary Checklist: A Practical Checklist.
  • Read the local rules, the assigned judge's standing order and individual practices, and the judge's prior rulings on answers and motions to strike. Some judges forbid "the document speaks for itself," some require pre-motion letters, and some districts require each answer paragraph to restate the allegation (Northern District of Illinois Local Rule 10.1 is the familiar example).
    • A local rule "imposing a requirement of form must not be enforced in a way that causes a party to lose any right because of a nonwillful failure to comply." Fed. R. Civ. P. 83(a)(2). That protects against forfeiture, not against an order to replead.
  • Confirm the Rule 11 basis for every response. Signing certifies that denials "are warranted on the evidence or, if specifically so identified, are reasonably based on belief or a lack of information." Fed. R. Civ. P. 11(b)(4). See the Rule 11 Sanctions and Safe Harbor Checklist: A Practical Checklist.

Part 4: Respond to every allegation under Rule 8(b)

  • Answer each numbered paragraph in order, using the complaint's numbering, and limit each answer paragraph as far as practicable to a single set of circumstances. Rule 10(b).
  • Use only the three permitted responses: admit, deny, or state that the defendant lacks knowledge or information sufficient to form a belief about the truth of the allegation. Fed. R. Civ. P. 8(b).
  • Admit what is true, and admit it precisely. Split compound paragraphs: admit the true part and deny the rest. Rule 8(b)(4).
  • Make each denial "fairly respond to the substance of the allegation." Rule 8(b)(2). Do not deny a paragraph because one word is wrong; admit the substance and deny the word.
  • Use "lack of knowledge or information" only after reasonable inquiry, and never for the client's own documents, website, filings, or public records. The statement "has the effect of a denial," Rule 8(b)(5), but courts treat improper uses as admissions or order repleading. Wright & Miller, Federal Practice and Procedure §§ 1261-1265.
  • Replace every "the document speaks for itself." Admit that the document exists and contains the quoted words, refer the court to the document for its complete contents, and deny the plaintiff's characterization. State Farm Mutual Automobile Insurance Co. v. Riley, 199 F.R.D. 276 (N.D. Ill. 2001).
  • For allegations that state legal conclusions, say so and add "to the extent a response is required, denied." Some judges reject even that; the safe course is to deny any conclusion you would not want treated as admitted.
  • Answer the jurisdictional allegations with care.
    • Admissions cannot create subject matter jurisdiction, which can be challenged at any time under Rule 12(h)(3). Insurance Corp. of Ireland v. Compagnie des Bauxites de Guinee, 456 U.S. 694 (1982). Factual admissions about citizenship, principal place of business, and amount in controversy will still be used.
    • Personal jurisdiction is waivable. An answer that admits "this Court has personal jurisdiction over Defendant" and omits the defense has given it away.
  • Challenge capacity, authority, or legal existence by a specific denial that states supporting facts peculiarly within the defendant's knowledge. Fed. R. Civ. P. 9(a)(2). A capacity defense not raised that way is waived. Summers v. Interstate Tractor & Equipment Co., 466 F.2d 42 (9th Cir. 1972).
  • Deny the performance of conditions precedent "with particularity." Rule 9(c). Name the condition and the facts (no written notice, no cure period, no audit request). A general denial leaves the allegation admitted. Jackson v. Seaboard Coast Line Railroad, 678 F.2d 992 (11th Cir. 1982).
  • Respond to everything else that states a fact: unnumbered introductory paragraphs, headings, footnotes, charts, images, and allegations incorporated from exhibits. Any allegation other than the amount of damages "is admitted if a responsive pleading is required and the allegation is not denied." Rule 8(b)(6).
  • Respond to the prayer for relief by denying that the plaintiff is entitled to any of the relief requested.
  • End the responses with a catch-all denial of every allegation not expressly admitted, including headings, footnotes, and the prayer. Rule 8(b)(3) permits a party to "generally deny all except those specifically admitted."
  • Do not file a general denial of the whole complaint unless the defendant can in good faith deny every allegation, including the jurisdictional grounds. Rule 8(b)(3).
    • State practice differs. California allows a general denial of an unverified complaint (Cal. Code Civ. Proc. § 431.30(d)), and Texas allows a general denial (Tex. R. Civ. P. 92) while requiring certain pleas to be verified (Tex. R. Civ. P. 93). A general denial filed in state court can survive removal, because repleading is unnecessary unless the court orders it, Rule 81(c)(2), but a federal-form answer is usually better if you have counterclaims or Rule 9 matters to plead.
  • Read the responses against the summary judgment plan. Every admission is a fact the defendant cannot contest later, and every denial of a provable fact invites a request for admission and possible expense-shifting under Fed. R. Civ. P. 37(c)(2).
  • Have the client review every admission and denial, and keep a written record that it confirmed them.

Part 5: Choose and plead the affirmative defenses

Part 6: Defenses intellectual property defendants must plead

IP statutes add defenses with their own pleading rules and burdens. Use this part with Part 5, not instead of it.

Patent

Copyright

Trademark

Part 7: Counterclaims, crossclaims, and third-party claims

Part 8: Formalities, signature, and filing

  • Copy the caption from the complaint (court, title, file number, and the Rule 7(a) designation), and title the document so a reader knows who is answering what: "Defendant Juniper Labs, Inc.'s Answer, Affirmative Defenses, and Counterclaims to the First Amended Complaint." Fed. R. Civ. P. 10(a). After the first party on each side, the caption may refer to the others generally.
  • File the Rule 7.1 disclosure statement with the defendant's first appearance, pleading, or motion, whichever comes first. Fed. R. Civ. P. 7.1.
    • A nongovernmental corporate party must identify any parent corporation and any publicly held corporation owning 10% or more of its stock, or state that there is none. Rule 7.1(a)(1).
    • In a diversity case, every party must also name, and identify the citizenship of, every individual or entity whose citizenship is attributed to it (the 2022 amendment). Rule 7.1(a)(2). Supplement the statement promptly if the information changes. Rule 7.1(b)(2).
    • Check local interested-party certificates as well (Northern District of California Civil Local Rule 3-15 is one example).
  • Demand a jury, if you want one, in the caption and in a separate paragraph at the end of the answer. The demand must be served no later than 14 days after the last pleading directed to the issue and filed under Rule 5(d). Fed. R. Civ. P. 38(b). Specify the issues if the demand is limited, Rule 38(c), and make your own demand rather than relying on the plaintiff's.
  • Redact personal identifiers: only the last four digits of Social Security, taxpayer, and financial account numbers, only the year of birth, and only a minor's initials. Fed. R. Civ. P. 5.2(a). A party that files its own information unredacted and not under seal waives the protection. Rule 5.2(h).
  • Sign the answer by at least one attorney of record (or the party, if unrepresented), with address, email address, and telephone number. Rule 11(a).
  • Verify the answer only if a rule or statute requires it. A federal pleading "need not be verified or accompanied by an affidavit" unless a rule or statute says so. Rule 11(a). When a verified statement is required, an unsworn declaration under 28 U.S.C. § 1746 works. State practice differs: an answer to a verified complaint must itself generally be verified in California (Cal. Code Civ. Proc. § 446) and New York (N.Y. C.P.L.R. 3020).
  • File through CM/ECF and serve under Fed. R. Civ. P. 5, with a certificate of service. Serve any party not registered for electronic filing by another permitted method.
  • Proof the final document against the complaint: every numbered paragraph answered once, the paragraph count matching, no surviving "speaks for itself," exhibits attached and labeled, defined terms consistent, and the counterclaims numbered separately.

Part 9: After filing: the deadlines the answer starts

Part 10: For plaintiffs: auditing the answer

  • Build an admissions chart keyed to the elements of each claim, citing answer paragraph numbers. Every admitted fact is one you will not have to prove.
  • Mark every evasive or missing response: "speaks for itself," "legal conclusion" with no denial, lack of knowledge about the defendant's own documents, "strict proof demanded," and any paragraph, heading, or footnote left unanswered. Unanswered factual allegations are admitted. Rule 8(b)(6).
  • Send a short meet-and-confer letter citing Rule 8(b), King Vision, and State Farm v. Riley, asking for an amended answer by a date certain. If the defendant refuses, ask the court to deem the allegations admitted or to order a compliant answer.
  • Test each affirmative defense against your circuit's pleading standard, and move to strike within 21 days only the defenses that would expand discovery or shift a burden. Fed. R. Civ. P. 12(f).
  • For defenses not worth a motion, serve contention interrogatories asking for the facts, witnesses, and documents behind each one. Fed. R. Civ. P. 33.
  • Answer or move against the counterclaims within 21 days. Rule 12(a)(1)(B). In trademark and patent cases, consider whether an unconditional covenant not to sue can moot declaratory and cancellation counterclaims under Already.
  • Decide whether to amend the complaint as a matter of course within 21 days after service of the answer, using what the answer revealed. Rule 15(a)(1)(B).
  • Serve your own jury demand on counterclaim issues within 14 days after serving your answer to the counterclaims, if you want a jury on them.
  • If the answer concedes the operative facts, consider a Rule 12(c) motion (Part 11).

Part 11: Judgment on the pleadings readiness (either side)

Part 12: Late answers and default rescue

  • If the deadline has passed but no default has been entered, file the answer immediately with a motion under Rule 6(b)(1)(B) explaining the delay in a declaration. The Pioneer factors decide it.
  • If the clerk has entered default, move to set it aside for good cause. Fed. R. Civ. P. 55(c). Courts weigh culpable conduct, a meritorious defense, and prejudice to the plaintiff. TCI Group Life Insurance Plan v. Knoebber, 244 F.3d 691 (9th Cir. 2001). The Second Circuit resolves doubts in favor of the defaulting party. Enron Oil Corp. v. Diakuhara, 10 F.3d 90 (2d Cir. 1993). Attach the proposed answer, because it is the proof of a meritorious defense.
  • If a default judgment has been entered, move under Fed. R. Civ. P. 60(b) promptly. Motions based on mistake, inadvertence, surprise, or excusable neglect must come within a reasonable time and no more than a year after judgment, Rule 60(c)(1); a judgment entered without valid service may be void under Rule 60(b)(4).
  • Know what a default concedes. It admits well-pleaded facts, but not conclusions of law, and a default "is not treated as an absolute confession" of liability. Nishimatsu Construction Co. v. Houston National Bank, 515 F.2d 1200 (5th Cir. 1975). Damages still require proof, often at a Rule 55(b)(2) hearing.

Common mistakes this checklist is designed to catch

  • Calendaring the deadline from the day the client forwarded the complaint rather than from service.
  • Relying on a stipulated extension the local rules required the court to approve.
  • Answering on the merits without preserving personal jurisdiction, venue, or service objections.
  • "The document speaks for itself," "strict proof demanded," and ignorance of the client's own records.
  • Letting headings, footnotes, or the prayer go unanswered and therefore admitted.
  • General denials of conditions precedent that Rule 9(c) required to be particular.
  • Thirty one-line defenses and a reservation of rights, instead of a dozen pleaded with facts.
  • Fraud and inequitable conduct pleaded without Rule 9(b) facts.
  • A compulsory counterclaim saved "for later," or a priority-based cancellation counterclaim filed after the registration's fifth anniversary.
  • A jury demand on day 15, a third-party complaint on day 15 without leave, and no Rule 7.1 statement.

Frequently asked questions

How many affirmative defenses should an answer include? As many as the facts support and no more. A dozen defenses with facts behind each one is stronger, and safer under Rule 11, than thirty one-liners. When in doubt about a defense that has some factual basis, plead it, because omission is the costlier error.

Can I add a defense I forgot? Usually. Within 21 days after serving the answer you may amend once as a matter of course; after that, ask for leave, which courts freely give before the scheduling order's deadline and give for good cause after it. Personal jurisdiction, venue, process, and service objections are the exception: once waived under Rule 12(h)(1), they do not come back.

Do I have to answer the counts I am not moving to dismiss? Most courts say no, because a partial motion suspends the time to answer the whole complaint, but some disagree. Get a stipulation or order confirming the deferral.

Do counterclaims go in a separate document? No. Counterclaims are part of the answer, which is why the pleading is titled "Answer and Counterclaims." Third-party complaints are separate pleadings served with a summons.

What do I say about allegations aimed only at another defendant? Say that the allegation is not directed at your client and, to the extent a response is required, state lack of knowledge or deny. Silence risks an admission under Rule 8(b)(6).

Is a jury demand in the answer enough? Yes, if the answer is served and filed within the Rule 38(b) period. Put "Jury Trial Demanded" in the caption and add a demand paragraph at the end.

When should a plaintiff bother moving to strike defenses? When a defense would open expensive discovery or shift a burden, and only within 21 days after service of the answer. Otherwise a meet-and-confer letter and a contention interrogatory do the same work for less.

Practical takeaways

  • Calendar the answer date from service, and confirm that any extension is effective under the local rules.
  • Decide motion or answer early, and put every Rule 12(h)(1) objection in the first filing.
  • Investigate before responding; admit precisely, deny characterizations, and answer every paragraph.
  • Plead each affirmative defense with a few sentences of facts, and plead fraud, inequitable conduct, capacity, and conditions precedent with particularity.
  • In IP cases, pair invalidity defenses with counterclaims and check the five-year line before planning trademark cancellation.
  • Plead compulsory counterclaims now, and calendar the 14-day windows for jury demands and third-party complaints.
  • Plaintiffs: inventory the admissions, challenge evasions, strike selectively, and consider Rule 12(c) when the answer concedes the facts.

This document is general information, not legal advice for any particular situation; the law changes, and the facts matter.

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