Concept
The Seven Defenses
Motions to dismiss
The Seven Defenses
Every defense belongs in the responsive pleading, but Rule 12(b) lets a party raise seven of them by motion before answering: lack of subject-matter jurisdiction, lack of personal jurisdiction, improper venue, insufficient process, insufficient service of process, failure to state a claim upon which relief can be granted, and failure to join a party under Rule 19.1 Memorizing the list is the easy part. The harder question is what a defendant loses by staying silent, because the seven defenses do not behave alike. They fall into three groups, and the group decides the defense's fate:
- Four defenses are lost to silence: personal jurisdiction, venue, insufficient process, and insufficient service of process. Each concerns the forum the plaintiff chose or the mechanics of starting suit, and each protects the defendant personally. Under Rule 12(h)(1), the defendant waives one of them (loses the right to assert it) by omitting it from a Rule 12 motion in the circumstances Rule 12(g)(2) describes, or by neither making it by motion nor including it in a responsive pleading or in an amendment allowed as of right.2 Either a motion or the answer preserves the defense, but only a motion lets a defendant who is right avoid all engagement with contested facts.3
- Two defenses survive silence: failure to state a claim and failure to join a required party. Each asks whether the suit can produce a valid judgment on the merits, and each may be raised later in the case, even at trial, as an independent defense.4
- One defense is never lost: subject-matter jurisdiction. It may be raised at any stage, even on appeal, and the court may raise it on its own initiative, because the defense rests on the limited authority of the federal courts and not on any party's personal right.5
The subsections below take the defenses in the rule's order and pair the ones that travel together. Later sections return to the waiver mechanics in detail.
Subject-Matter Jurisdiction
Rule 12(b)(1) opens the list with the motion for lack of subject-matter jurisdiction.6 Subject-matter jurisdiction is a court's constitutional or statutory power to entertain a particular controversy, so a defendant who raises the defense argues that this kind of dispute does not belong in this court at all.7 Diversity shows how the defense works. A federal court may hear a state-law suit under diversity jurisdiction only when the parties come from different states; if the defendant proves to share the plaintiff's state, the basis for jurisdiction disappears.8 Whether the plaintiff's claim is strong, and whether it is fair to make this defendant appear here, are separate questions that other defenses answer.
The defense stands apart from the personal objections that follow because it protects no one's personal right. Because the issue concerns the court's own power, an objection may be made at any time in the proceedings, even for the first time on appeal. The defendant may use the responsive pleading or a separate motion, and the court has an independent obligation to inquire into its own jurisdiction.9 Personal jurisdiction is different. It protects the defendant, and a defendant who defends on the merits without objecting loses it.10
The first scene shows the defense at work. Shared citizenship removes the federal court's power over the case, and that defect would follow Paolo wherever in the federal system he filed. The second scene marks the boundary. Priya complains about where the case is heard, a subject venue and transfer address, and an inconvenient court still has power to decide the case.11 The usual exam error is treating any complaint about the plaintiff's chosen forum as jurisdictional, when Rule 12(b)(1) asks only whether the court has authority over this type of case.
A defendant may attack jurisdiction in two ways, and the choice controls what the court examines. A facial attack accepts the plaintiff's jurisdictional facts as true and contests only the legal foundation for federal jurisdiction, so the court presumes the complaint's factual allegations true and assesses only their legal sufficiency.12 A factual attack disputes the facts themselves. Suppose the complaint alleges that Priya is a Colorado citizen and Priya offers evidence that she is a New Mexico citizen. No presumption of truth attaches to the complaint. The plaintiff must submit evidence and prove jurisdiction by a preponderance, and the court may weigh the evidence, make findings, and order discovery limited to the jurisdictional issue.13
A jurisdictional dismissal costs the plaintiff only the choice of forum. It is not a decision on the merits, so the plaintiff remains free to refile in a court that has authority.14
Personal Jurisdiction and Venue
Rule 12(b)(2) lists lack of personal jurisdiction, and Rule 12(b)(3) lists improper venue.16 Both are wrong-court defenses, but each asks something different about the court the plaintiff chose. Personal jurisdiction asks whether the court has power over this defendant, a question about the defendant's relationship to the forum. Venue asks whether the district where the plaintiff filed is one the venue statute permits, a question about where within a court system the case belongs.17 Neither tests whether the plaintiff's claim is any good, so a defendant can raise either without admitting or disputing a single fact about what happened. The standards that decide whether a given court has personal jurisdiction or venue are separate subjects. For Rule 12 purposes, what matters is how each objection operates and where it sits among the seven.
A defendant may raise these objections before answering because a valid one usually ends the case in that court. A court without personal jurisdiction has no power to render a binding decision against the defendant, so dismissal is the usual result.18 Requiring a defendant to answer a complaint filed in the wrong court would accomplish nothing, and Rule 12(b) therefore offers a route to immediate dismissal.19 The motion also removes a danger. A defendant who ignores a suit in a distant forum risks a default judgment that the plaintiff may try to enforce in any state where the defendant owns property, while a defendant who appears only to contest jurisdiction avoids litigating the merits without that risk.20
Students most often confuse personal jurisdiction with service of process. The two separate once you ask whether the objection concerns the court's power or the delivery of the papers. Proper service is not a substitute for a basis for personal jurisdiction, and both requirements must be met before the suit can proceed.21
Venue operates one layer below. It is a statutory requirement that sorts cases among the districts of a court system and identifies a convenient place for the parties to litigate, and it comes into play once subject-matter and personal jurisdiction are assumed to be satisfied.22 The layers are independent, since a court may have power over the defendant and still sit in an improper venue. One refinement matters for exam answers. When a contract contains a forum-selection clause, the Supreme Court has held that a defendant in federal court enforces it by moving to transfer, not by moving to dismiss for improper venue, in Atlantic Marine Construction Co. v. United States District Court for the Western District of Texas.23
When venue really is improper, the usual remedy is transfer, not dismissal. A sound personal-jurisdiction objection, by contrast, usually ends in dismissal.24 Rule 12(b)(3) and 28 U.S.C. § 1406 authorize the court to dismiss, and § 1406 also lets it transfer the case if doing so is in the interest of justice.25 Suppose a plaintiff files in the District of Nevada when the only proper venue is the District of Utah. Dismissal would force the plaintiff to refile in Utah at a cost in time and expense, and the statute of limitations might expire in the meantime. A transferred case, however, is treated as filed on the date it first reached the original court. A court will therefore usually find that transfer serves the interest of justice when a proper venue exists, a conclusion with support in Goldlawr, Inc. v. Heiman.26
Both defenses sit in the waivable group because each protects the parties and not the court. Venue offers protection to the parties, which makes it more like personal jurisdiction than like subject-matter jurisdiction. Filing in an improper venue does not implicate the court's constitutional authority at all; it means only that the case sits in a court the legislature considered inconvenient or inefficient for the parties or witnesses.27 A defendant who fails to raise venue in a pretrial motion or in the answer is therefore deemed to acquiesce, and the objection is waived unless the motion is made at an appropriate time, usually quite early.28
Lewis shows what silence costs on the personal-jurisdiction side. Sued in Mississippi, Lewis owns property in Ohio. He appears and defends on the merits without objecting to jurisdiction, loses, and then tries to resist enforcement of the judgment in Ohio on the ground that Mississippi lacked personal jurisdiction. Ordinarily a defendant may resist enforcement on that ground, but Lewis waived the objection by defending on the merits, and he cannot raise it by direct attack in Mississippi or by collateral attack in Ohio.29 Had Lewis made the same objection in his first Rule 12 motion or in his answer, he would have kept it. Rule 12(h)(1) writes that result into the rules: the defense is waived if omitted from a Rule 12 motion in the circumstances Rule 12(g)(2) describes, or if the party neither makes it by motion nor includes it in a responsive pleading or in an amendment allowed as of right.30 Subject-matter jurisdiction protects the court's own authority, which is why silence cannot waive it.
Process and Service of Process
Rule 12(b)(4) lists insufficient process, and Rule 12(b)(5) lists insufficient service of process.33 The names sound alike, but each attacks a different object. Process is the summons, the court document that accompanies the complaint, and service of process is the act of delivering those papers to the defendant. Rule 12(b)(4) therefore asks whether the summons itself is defective, and Rule 12(b)(5) asks whether the papers reached the defendant in an acceptable way. Both defenses concern the form of the process or the method of serving it, technical problems that say nothing about the strength of the claim or the court's power.34
A summons that lacks the clerk's signature or the court's seal is defective in form, and the objection is insufficient process. A summons that is complete but reaches the defendant by an unauthorized route presents a delivery problem, and the objection is insufficient service. Goliath's case offers a second kind of delivery defect: if no copy of the complaint was served on him, he has an objection to service of process, and he would not yet know what the complaint alleged.35 The distinction does practical work because the cures differ. A court often declines to dismiss when the plaintiff can correct the defect by amending the process, and when service was insufficient it orders proper service before proceeding.36
Service also differs from personal jurisdiction, though the two were historically intertwined. Each is a distinct due process requirement, and either can be satisfied while the other fails.37 Suppose Lovelace causes tortious injury in Utah and is sued there. Because he caused the injury in the state, the Utah court has constitutional power over him, and a Rule 12(b)(2) motion would fail. If the plaintiff serves him only by publication, however, the service is improper, because publication is generally not a constitutionally adequate way to tell a defendant he has been sued, and a Rule 12(b)(5) motion would succeed.38 Set that case beside the Alaska hypothetical in the preceding subsection and the lesson is plain. Proper delivery cannot stand in for power over the defendant, and power over the defendant cannot repair a bad delivery. Name the objection after what it attacks.
Winning a Rule 12(b)(4) or 12(b)(5) motion usually produces a repair, not the end of the suit. When the defendant is subject to jurisdiction in the forum but was not properly served, the court may simply order process served in an appropriate manner and then proceed.39 Rule 12(b) exists in part to flush out such preliminary problems before the substantive work begins.40 Because the defects are curable, a motion on these grounds alone frequently looks like a dilatory tactic, and such motions are most commonly joined with a challenge to personal jurisdiction.41
Because the defects concern form and method and can be fixed, the rules want them raised at the outset and treat silence as acceptance. Service objections that do not involve a failure to give actual notice or to obtain personal jurisdiction present primarily technical problems, so they are waivable unless raised by pretrial motion or in the answer.42 Rule 12(h)(1) places both defenses in the waivable group: a party waives either one by omitting it from a Rule 12 motion in the circumstances Rule 12(g)(2) describes, or, having made no motion, by failing both to make it by motion and to include it in a responsive pleading or in an amendment allowed as of right.43
The usual exam error runs in two directions. One is to call a delivery defect a personal-jurisdiction problem, and the other is to treat a summons or service defect as something the defendant may raise whenever convenient, as if it carried the permanence of a challenge to the court's authority. Both mistakes disappear once you sort the objection by its target and trace it to the waiver rule.
Merits-Related Defenses
Rule 12(b)(6) lets a party move to dismiss for failure to state a claim upon which relief can be granted, and Rule 12(b)(7) lets a party move for failure to join a party under Rule 19.45 These two defenses sit closer to the merits than the wrong-court and delivery defenses, and the Rules treat a slow defendant more generously here. Failure to state a claim asks whether the facts the plaintiff pleaded, if proved, would entitle the plaintiff to any relief. Failure to join asks whether the suit, as the plaintiff framed it, includes everyone who must be present for the case to proceed fairly.
The Rule 12(b)(6) motion takes every factual allegation in the complaint as true and asks whether the governing law would grant relief on those facts. Under recent Supreme Court decisions, the motion can succeed by showing that, even then, no recovery is “plausible” under any legal theory, a standard easier for defendants to meet than the one that applied before 2007.46 That assumption fixes the motion's limits. Like a demurrer, a 12(b)(6) motion may neither allege new facts nor contest the plaintiff's, because it challenges only the legal sufficiency of what the plaintiff alleged.47 A defendant who denies that the events happened as pleaded gains nothing from this motion, and the denial belongs in the answer.
The demurrer explains the motion's shape. At common law a general demurrer ended the action whichever way it was decided. If it was sustained, the plaintiff's action was terminated and judgment went against him. If it was overruled, the defendant lost the chance to contest the facts and judgment went against the defendant, and neither party could amend.48 The federal motion leaves each side a next step. A plaintiff whose complaint is dismissed will almost always be allowed to amend, and a defendant whose motion is denied goes on to defend the claim at trial.49 The early ruling screens out claims that have no legal basis and leaves a fixable case alive.
The motion works best when the complaint itself reveals a legal bar. If the complaint's own dates show that the suit was filed after the limitations period expired, then every allegation taken as true leaves any cause of action time-barred, and the court will dismiss without hearing a word of evidence.50 Everything the court needs sits on the face of the pleading, and the defendant contests none of it.
The repair-log motion cannot succeed as a pure pleading challenge, because its answer lies outside the complaint. When matters outside the pleadings are presented and the court does not exclude them, the motion is treated as one for summary judgment. The parties can then put the merits before the court and are not limited to an attack on the paper allegations.51 The court must therefore either set the attachments aside or convert the motion. The limitations motion works because the complaint carries its own answer, while the heating motion changes character because it needs evidence the complaint does not contain.
Rule 12(b)(7) shifts from the legal basis of the claim to the shape of the suit. Rule 19 supplies the test for who counts as a required party, and this chapter treats only the motion that raises the defect. The defect is usually curable and does not require dismissal. The court will order the absentee joined if that is possible. If joinder is not possible, for example because joining the absentee would destroy diversity, the court decides whether the case can proceed without that person and dismisses only if proceeding would be unfair.52
Both defenses share a feature that the waiver sections of this chapter will use: neither is lost by leaving it out of an early motion. A party may press them later, even at trial, as independent defenses that do not depend on the evidence presented on the merits.53 The reason lies in what the defenses protect. The four technical defenses belong to the defendant personally, so silence can fairly be read as consent. A claim with no legal basis is different. Forcing a party to give up a meritorious objection merely for not raising it early would lead to recovery on imaginary legal claims or to denial of recovery based on imaginary defenses, and a costly trial on a claim that, if proved, would have no legal effect wastes judicial resources.54 The challenge to the legal sufficiency of a pleading is never waived, and that rule exists to rid the system of spurious complaints. The usual exam error is treating these two defenses like the four technical ones and declaring them lost because a first motion or an answer left them out.