To file a motion to dismiss a frivolous lawsuit, respond within your court’s deadline (21 days in federal court) with a written motion arguing that the complaint fails to state a legal claim under Rule 12(b)(6) or a state equivalent, file it with the clerk, and serve a copy on the plaintiff. Done properly, this can end a baseless case in weeks. Done late, or done wrong, it can leave you facing a default judgment on a lawsuit that never had merit to begin with.
Know Your Response Deadline First
Nothing else matters until you fix your deadline. In federal court, you have 21 days from the date you are served with the summons and complaint to file either a motion to dismiss or a written answer.1Legal Information Institute. Federal Rules of Civil Procedure Rule 12 – Defenses and Objections State courts set their own windows, usually 20 to 30 days. The clock runs from the date of service, not the date you read the papers.
If you file nothing, the plaintiff can ask the court to enter a default and then a default judgment, meaning they win without ever proving their case. This happens even when the underlying lawsuit is completely frivolous. A meritless complaint that goes unanswered still produces a binding judgment.
Filing a motion to dismiss pauses your answer deadline. Under the federal rules, if the court denies your motion, you get 14 more days after notice of the ruling to file your answer.1Legal Information Institute. Federal Rules of Civil Procedure Rule 12 – Defenses and Objections So you do not have to draft both documents at once. The motion buys you time if it fails.
Grounds You Can Argue
The workhorse ground against a frivolous suit is failure to state a claim. That is the standard under Federal Rule 12(b)(6), and every state has an equivalent.1Legal Information Institute. Federal Rules of Civil Procedure Rule 12 – Defenses and Objections The argument is that even if every fact in the complaint were true, the plaintiff has not described anything the law actually prohibits or provides a remedy for.
Courts apply what lawyers call the plausibility standard. The judge reads the complaint, sets aside bare legal conclusions, and asks whether the remaining factual allegations plausibly suggest wrongdoing. A complaint that a competitor used “mind control” to steal customers fails on its face. A complaint that your neighbor’s paint color is offensive fails because no law governs paint color.
Rule 12(b) also lists other grounds worth considering: the court lacks subject-matter jurisdiction, the court lacks personal jurisdiction over you, the venue is wrong, or you were not served properly.2United States Courts. Federal Rules of Civil Procedure Frivolous complaints often have jurisdictional defects because the filer never thought carefully about which court can hear the case.
A separate ground focuses on why the suit was filed. Rule 11 requires anyone signing a court filing to certify that the claims have evidentiary support, are grounded in existing law, and are not being presented to harass or cause delay.3Legal Information Institute. Federal Rules of Civil Procedure Rule 11 – Signing Pleadings, Motions, and Other Papers; Representations to the Court; Sanctions A complaint that violates these requirements can support a sanctions motion, which is separate from the motion to dismiss.
Gather What You Need Before Drafting
Start with the complaint itself. It contains the specific allegations, the case number, the court, and the legal theories in play. Read it slowly. Frivolous complaints often mix emotional grievance with legal-sounding language. Separate the two, and list every distinct legal claim, whether defamation, breach of contract, fraud, or something else. Your motion has to address each one.
Pull any evidence that contradicts the plaintiff’s story. Emails, contracts, photographs, timestamps, records. You generally cannot introduce outside evidence in a Rule 12(b)(6) motion because the court looks only at the face of the complaint. But organizing your evidence now shows you where the complaint falls apart and prepares you for the phase after the motion.
Then research the elements of each claim in your jurisdiction. If fraud is alleged, look up what fraud requires. Frivolous complaints regularly omit required elements — accusing someone of lying, for example, without alleging any reliance on the lie or any damages caused by it. Those gaps are the core of your motion.
Drafting the Motion
Every filing opens with a caption naming the court, the parties, and the case number.4Legal Information Institute. Federal Rules of Civil Procedure Rule 10 – Form of Pleadings Below it, a short introduction states what you are asking for: dismissal under Rule 12(b)(6), or whatever ground applies.
The substance goes in a supporting memorandum of law, sometimes called a memorandum of points and authorities or a brief in support. It walks the judge through the relevant facts from the complaint, states the legal standard, and argues why the complaint fails to meet it. A standard structure is a statement of facts, then arguments organized by each claim you want dismissed, then a conclusion asking for specific relief. If the complaint is so defective that no amendment could save it, ask for dismissal with prejudice.
Local rules matter as much as the federal rules. Page limits, font size, margin width, tables of contents, tables of authorities — each federal district and each state court sets its own requirements. A motion with strong arguments can still be rejected on formatting alone. Read the local rules before you file.
Filing and Serving
File the motion with the court clerk. Federal courts and many state courts use electronic filing systems that generate a timestamped confirmation, and that confirmation is your proof of filing.
After filing, every other party in the case needs a copy. In federal court, electronic filing automatically serves all registered parties, so no separate certificate of service is needed. If you serve by mail or hand delivery, file a certificate of service showing when and how you delivered the papers.5Legal Information Institute. Federal Rules of Civil Procedure Rule 5 – Serving and Filing Pleadings and Other Papers
Federal court generally charges no separate fee for a motion to dismiss; the initial appearance fee covers motions during the case. State courts vary, and some charge modest motion fees.
What Happens After You File
The plaintiff gets a set period to file a written opposition. In federal court, local rules typically allow 14 to 21 days, and you may get to file a reply.
Most federal motions to dismiss are decided on the papers, without oral argument. Judges read the motion, the opposition, and any reply, then issue a written ruling. Some judges do schedule oral argument in complex cases or when they have specific questions. Rule 12(i) gives either party the right to request a pretrial hearing, but the court controls whether one actually happens.1Legal Information Institute. Federal Rules of Civil Procedure Rule 12 – Defenses and Objections State practice differs; some courts hold hearings on every motion, others rarely.
Consider asking the court to pause discovery while the motion is pending. Discovery is expensive, and if the motion succeeds, all of it is wasted. There is no automatic pause, and judges have wide discretion. Courts weigh the cost of unnecessary discovery against the delay a stay would cause if the motion is denied. A motion that argues the whole case should go makes a stay easier to justify.
Three Possible Outcomes
A ruling on the motion goes one of three ways, and each sends you down a different path.
Granted. The lawsuit is dismissed. The critical detail is whether it is dismissed with prejudice or without. With prejudice is a final judgment on the merits; the plaintiff cannot bring the same claim again.6Legal Information Institute. With Prejudice Without prejudice lets the plaintiff fix the defects and refile.7Legal Information Institute. Federal Rules of Civil Procedure Rule 41 – Dismissal of Actions For a truly frivolous case, argue for with prejudice in your motion.
Denied. The judge finds the complaint states a plausible claim, and the case moves to discovery. That does not mean the plaintiff will win, only that the complaint clears the minimum bar. File your answer within 14 days of the ruling and begin preparing your defense on the merits.1Legal Information Institute. Federal Rules of Civil Procedure Rule 12 – Defenses and Objections
Granted with leave to amend. This is the most common result when the complaint has some kernel of a claim but is poorly drafted. The judge dismisses the current version but lets the plaintiff try again. Courts generally allow at least one amendment when justice requires it. If an amended complaint arrives, you can file a new motion targeting the revised allegations.
Seeking Sanctions Against the Filer
Getting the case dismissed is one thing. Making the plaintiff pay for filing it is separate. Rule 11 lets you seek sanctions against a party or their lawyer for filings that lack legal or factual merit or were made for an improper purpose like harassment.
The procedure has a safe harbor. You must serve your sanctions motion on the other side at least 21 days before filing it with the court. During that window they can withdraw or correct the offending filing to avoid sanctions. If they do not, you file with the court. The sanctions motion has to be filed separately from your motion to dismiss; you cannot combine them.3Legal Information Institute. Federal Rules of Civil Procedure Rule 11 – Signing Pleadings, Motions, and Other Papers; Representations to the Court; Sanctions
Sanctions can include the attorney fees and costs you incurred because of the frivolous filing. One limit worth knowing: courts cannot impose monetary sanctions against a represented party solely for making weak legal arguments. The monetary penalty for bad legal theories lands on the attorney who signed the filing, not the client.3Legal Information Institute. Federal Rules of Civil Procedure Rule 11 – Signing Pleadings, Motions, and Other Papers; Representations to the Court; Sanctions
Federal courts have other tools too. Under 28 U.S.C. § 1927, an attorney who unreasonably multiplies proceedings can be ordered to personally pay the excess costs, expenses, and attorney fees their conduct caused.8Office of the Law Revision Counsel. 28 USC 1927 – Counsels Liability for Excessive Costs Courts also have inherent authority to sanction bad-faith litigation conduct. Most states have their own versions of these provisions.
If the Suit Targets Speech, Check Anti-SLAPP First
If the lawsuit is about something you said, wrote, or published — a negative review, a public comment, a social media post — there may be a stronger tool than a standard motion to dismiss. Roughly 39 states have anti-SLAPP statutes designed to quickly dispose of Strategic Lawsuits Against Public Participation.
Anti-SLAPP motions typically shift the burden to the plaintiff to demonstrate their claim has merit at an early stage. If they cannot, the case is dismissed. The feature that gives these laws teeth is mandatory fee-shifting: in most states with anti-SLAPP laws, a defendant who wins the motion recovers attorney fees and litigation costs from the plaintiff, which makes filing a baseless speech suit financially dangerous.
Coverage varies. Some statutes cover only speech about government proceedings; others protect any speech on a matter of public concern. There is no federal anti-SLAPP statute, though federal courts sitting in states with these laws sometimes apply them. If your case involves speech or public participation, check whether your state has one before choosing your defense.
When to Hire a Lawyer
You can file a motion to dismiss without an attorney, and people do. A motion to dismiss is a legal argument, not a factual narrative. The judge is not deciding who is right about what happened; the judge is deciding whether the complaint, on its face, states a viable legal claim. That means knowing the elements of each cause of action, the procedural rules for your specific court, and the format judges expect. Local rules alone can run dozens of pages, and a motion that ignores them may be denied outright.
The stakes matter too. If the suit involves significant money, your professional reputation, or your business, the cost of an attorney is usually worth it against the risk of a procedural misstep that lets a frivolous case survive. Many attorneys offer limited-scope representation, drafting the motion and memorandum while you handle filing and any hearing. If cost is a barrier, legal aid organizations and bar association referral services can point you toward affordable help.