How to Fill Out a Response Form: Answer, Defenses, and Filing

To fill out a response form for a civil complaint, you draft what the rules call an “answer”: copy the caption from the complaint, respond to every numbered allegation by admitting it, denying it, or stating you lack knowledge, list any affirmative defenses that apply, add compulsory counterclaims, then file the document with the court and serve a copy on the other side. In federal court you have 21 days from service of the summons and complaint to do this, or 60 days if you signed a waiver of formal service (90 days if you were served outside the United States).¹ State courts set their own windows, commonly 20 or 30 days, so check your local rules if you were sued in state court. Miss the deadline and the plaintiff can ask the clerk to enter default against you, which is difficult to undo.²

Before drafting anything, check whether your court publishes a fill-in form. The federal courts provide a pro se answer template (Pro Se 3) designed for defendants representing themselves, and most state courts offer their own standardized forms through the clerk’s office or court website.³ Using an approved template avoids formatting problems that can delay processing.

Fill In the Caption

Every pleading starts with a caption, which is the header block at the top of the first page. Federal Rule 10 requires it to show the court’s name, the case title, the file number the clerk assigned, and a designation of the document. For your answer, that designation is “Answer to Complaint.” All of this information is already on the complaint you received, so you can copy it directly. In the title block itself you only need to name the first party on each side; the rest can be referenced as “et al.”⁴

Respond to Every Numbered Allegation

The body of the answer addresses the complaint paragraph by paragraph. The complaint is broken into numbered paragraphs, each containing a specific allegation, and your answer must mirror that numbering. Paragraph 1 of your answer responds to paragraph 1 of the complaint, paragraph 2 to paragraph 2, all the way through.³

Federal Rule 8(b) gives you three ways to respond to each paragraph:⁵

Admit that the allegation is true. Use this for facts you cannot honestly dispute, such as your name or the fact that a contract existed.
Deny the allegation. A denial forces the plaintiff to prove that claim with evidence. Your denial must “fairly respond to the substance of the allegation”; vague or evasive denials are not allowed.
State that you lack sufficient knowledge or information to admit or deny. This has the same effect as a denial.

You can also split a response, admitting part of an allegation and denying the rest. If the complaint says you owe $25,000 under a written agreement, you might admit the agreement exists but deny the amount.⁵

The most dangerous mistake is skipping a paragraph. Under Rule 8(b)(6), any allegation you fail to deny is treated as admitted, with the sole exception of allegations about the amount of damages.⁵ Read the complaint with a pen in hand and check off each numbered paragraph as you draft your response. One overlooked allegation can hand the plaintiff a fact they would otherwise have to prove at trial.

List Your Affirmative Defenses

After responding to the allegations, add a section for affirmative defenses. An affirmative defense says, in effect, that even if the plaintiff’s claims are true, you still win because of some additional fact. Rule 8(c) requires you to raise these in your answer, and failing to raise a defense can waive it permanently. The rule names these among others:⁵

Statute of limitations, meaning the plaintiff waited too long to sue.
Payment, meaning you already paid the amount claimed.
Release, meaning the plaintiff signed a document releasing you from liability.
Fraud, meaning the underlying agreement was induced by fraud.
Duress, meaning you entered the agreement under coercion.
Estoppel, meaning the plaintiff’s own conduct should prevent them from pursuing the claim.
Accord and satisfaction, meaning both parties agreed to resolve the dispute on different terms.
Contributory negligence, meaning the plaintiff’s own carelessness caused or contributed to their harm.
Res judicata, meaning the same claim was already decided in a prior lawsuit.
Waiver, meaning the plaintiff gave up the right they now try to enforce.

Rule 8(c) also lists arbitration and award, assumption of risk, failure of consideration, illegality, injury by fellow servant, laches, license, and statute of frauds.⁵ Only assert defenses you genuinely believe apply, because courts can impose sanctions for raising defenses without a factual basis. But err on the side of including a plausible defense rather than leaving it out. You may not get another chance.

Add Counterclaims and Cross-Claims If They Apply

Your answer can also carry your own claims. If you have a claim against the plaintiff, you file it as a counterclaim in the same document as the answer. Federal Rule 13 draws a critical distinction:⁶

A compulsory counterclaim arises from the same transaction or event as the plaintiff’s lawsuit. You must include it in your answer, or you lose the right to bring it in a separate lawsuit later.
A permissive counterclaim does not arise from the same transaction. You may include it for efficiency, but you can also file it as a separate action.

A counterclaim can seek more money than the plaintiff is asking for, or a different type of relief entirely.⁶

When there are multiple defendants, a cross-claim lets one defendant assert a claim against a co-defendant, but only if the claim arises from the same transaction as the original lawsuit. For example, if two contractors are sued for defective work, one might cross-claim that the other is responsible for the damages.⁶

File the Answer and Serve the Other Side

A completed answer has to be both filed with the court and served on the opposing party. Most federal courts and a growing number of state courts require electronic filing through a centralized portal. E-filing systems typically charge a convenience fee set by the court, so check the current schedule on the court’s website. If you cannot afford the fee, you can apply to proceed in forma pauperis by submitting an affidavit describing your financial situation, and the court may waive it.⁷

Courts that still accept paper filings let you deliver the answer in person to the clerk’s office or send it by certified mail with a return receipt. Either way, keep a date-stamped copy for your records.

Filing does not satisfy your obligation to serve the opposing party. Federal Rule 5 requires every pleading filed after the original complaint to be served on all other parties. If the plaintiff has an attorney, serve the attorney rather than the plaintiff. Acceptable methods include handing the document to the person, mailing it to their last known address, or sending it through the court’s e-filing system if both parties are registered users.⁸

After serving, file a proof of service or certificate of service with the court that documents the date and method of delivery. Without proof of service on file, the court may disregard your answer entirely.

Fixing Mistakes After You File

If you realize after filing that you forgot an affirmative defense, miscategorized an admission, or need to add a counterclaim, you can amend the answer. Under Federal Rule 15(a), you may amend once as a matter of course, meaning no permission needed, within 21 days of serving the answer. After that window closes you need either the opposing party’s written consent or the court’s permission. Courts are generally willing to grant leave when justice requires it, but the longer you wait, the harder it becomes to justify the change.⁹

Treat the 21-day amendment window as a safety net rather than a reason to rush. A thorough first answer that addresses every allegation, raises all applicable defenses, and includes any compulsory counterclaims spares you the trouble of amending later and the risk of a court denying your request if you wait too long.

1
United States Courts. Federal Rules of Civil Procedure – Rule 12(a)
2
Legal Information Institute. Federal Rules of Civil Procedure Rule 55 – Default; Default Judgment
3
United States Courts. Pro Se 3 – The Defendant’s Answer to the Complaint
4
Legal Information Institute. Federal Rules of Civil Procedure Rule 10 – Form of Pleadings
5
Legal Information Institute. Federal Rules of Civil Procedure Rule 8 – General Rules of Pleading
6
United States District Court for the Northern District of Illinois. Rule 13 – Counterclaim and Cross-Claim
7
Office of the Law Revision Counsel. 28 USC 1915 – Proceedings In Forma Pauperis
8
Legal Information Institute. Federal Rules of Civil Procedure Rule 5 – Serving and Filing Pleadings and Other Papers
9
Legal Information Institute. Federal Rules of Civil Procedure Rule 15 – Amended and Supplemental Pleadings