Introduction

A court's judgment is an exercise of coercive state power: it can take a defendant's money, command or forbid conduct, dissolve a marriage, or transfer title to property. Before any of that force may be brought to bear, the court must have authority over the defendant personally, and the law calls that authority personal jurisdiction. The limit on that authority is constitutional. The Due Process Clause forbids a state from commanding a person who has no meaningful connection to it, because a state that could reach anyone anywhere would leave every defendant exposed to suit in whatever forum a plaintiff found most congenial. The consequence of crossing the limit is severe: a judgment entered without personal jurisdiction is void rather than merely mistaken, and it binds no one in the rendering state or anywhere else. Yet because the requirement protects the defendant's own liberty rather than the structure of the courts, the defendant may give the protection up — a feature that shapes both the substance of the doctrine and the procedure for invoking it.

Every personal jurisdiction question proceeds through the same two inquiries: a statute must authorize the court's reach over the defendant, and the Constitution must permit the exercise. Within the constitutional inquiry, the modern law runs on two tracks — power over claims connected to the defendant's own conduct aimed at the forum, and all-purpose power over defendants whose ties to the forum are so complete that they are effectively at home there. This chapter builds the doctrine in the order the Supreme Court built it: the traditional territorial bases that survive today, the contacts-based reformulation that reshaped the field, the two elements that reformulation generates, the separate track of all-purpose jurisdiction, the fate of jurisdiction premised on property, and finally the procedural rules that make the objection a defense the defendant must raise at the threshold or lose.

The Power Question and Its Sources

Personal jurisdiction is the court's power over the defendant, and it answers a different question from subject-matter jurisdiction. Subject-matter jurisdiction asks whether the court may hear this kind of case at all; personal jurisdiction asks whether the court may bind this particular defendant to whatever it decides. For state courts the outer limit comes from the Due Process Clause of the Fourteenth Amendment, and the governing formulation comes from International Shoe Co. v. Washington: a defendant not present in the forum may be subjected to judgment only if it has such contacts with the state that maintaining the suit comports with fair play and substantial justice¹. The reason the Constitution polices this question at all is that a judgment directs coercive state power at a person. Without some connection between the defendant and the forum, the state has no legitimate claim to that person's obedience, and a contrary rule would force defendants to bear the practical burden of defending wherever any plaintiff, anywhere, chose to file.

Framing the limit as due process rather than as a rule of convenience carries two consequences worth fixing at the outset. First, a judgment entered without personal jurisdiction is void, not merely erroneous: it is invalid where rendered and unenforceable everywhere else, so the defect can be attacked even in a later enforcement proceeding in another state. Second, because the requirement protects an individual liberty interest rather than the structural competence of the courts, the defendant may waive it — expressly, by contract, or by litigation conduct. Subject-matter jurisdiction works the other way: no party can confer it and no party can forfeit it. That contrast returns at the end of this chapter, where the Federal Rules turn the personal-jurisdiction objection into a defense that dies if it is not raised at the very start of the case.

Every analysis therefore proceeds in two steps. A statute — usually the forum state's long-arm statute — must first authorize the court to reach the defendant, because the Constitution only draws an outer boundary, and each state decides for itself, by legislation, how far within that boundary its courts will go. Only then does the constitutional question arise. Federal courts ordinarily borrow the same measure: under the governing service rule, a federal district court may reach a defendant only as far as the courts of the state in which it sits could reach him. The two poles of the doctrine follow directly from this power framing. A defendant served with process while running a business in the forum sits squarely within the forum's power, at least for claims arising from that business. A defendant with no contacts, property, presence, or consent in the forum cannot be bound by its courts even if the plaintiff lives there and would find litigation there far more convenient, because the plaintiff's circumstances supply no power over the defendant.

Traditional Bases of Jurisdiction

Before the modern framework, the law of personal jurisdiction was territorial: a state had power over the persons and things found within its borders, and jurisdiction rested on physical presence, domicile, or consent. Those bases survive today. The most striking survivor is transient or "tag" jurisdiction: personal service of process on a defendant physically present in the state confers jurisdiction for any claim, however brief the visit and however unrelated the suit. In Burnham v. Superior Court, a New Jersey father was handed a California divorce summons while visiting the state for a few days on business and to see his children, and the Court unanimously upheld California's jurisdiction without any inquiry into his contacts². The Justices divided only on the reason. Justice Scalia rested on the rule's unbroken historical pedigree — a practice accepted since before the Fourteenth Amendment was adopted cannot offend traditional notions of fairness — while Justice Brennan insisted that even ancient rules must pass an independent fairness inquiry, which in-state service passes because a voluntary visitor knowingly enjoys the state's benefits³.

Both rationales converge on the same mechanism. A person voluntarily inside a state's borders enjoys its roads, its police and fire protection, and the shelter of its laws for the duration of the visit, and the state may fairly demand submission to its courts in exchange for that enjoyment. The rule also has an administrability virtue: service inside the state is a bright line that requires no weighing of contacts, so it generates almost no preliminary litigation over the court's own power. The traditional edges of the rule confirm that the voluntary quality of the visit is what does the work: presence procured by the plaintiff's force or fraud, and presence for the purpose of attending unrelated judicial proceedings, have long been exempt from service.

The other traditional bases operate on the same logic. Domicile in the forum supports jurisdiction over the domiciliary for any claim, on the theory that no one is unfairly surprised by having to answer at home, and consent supports jurisdiction whenever the defendant gives it — in advance, through a forum-selection clause in a contract, or afterward, through litigation conduct that submits to the court. What separates these bases from everything that follows in this chapter is their scope. Transient presence gives the forum all-purpose power the moment service occurs, while contacts-based jurisdiction must be analyzed claim by claim. The theory also has a hard boundary: a nonresident served by mail at his out-of-state home, who has never entered the forum, gives the forum nothing under the presence theory, and the plaintiff must instead proceed under the framework the next section introduces.

International Shoe and Minimum Contacts

The territorial regime broke down over the corporation. A modern corporation acts everywhere without being "present" anywhere except the states of its incorporation and headquarters, and courts for decades sustained jurisdiction over out-of-state companies through fictions — the corporation had "impliedly consented" to suit by doing business, or was "constructively present" through its agents — labels that concealed the real inquiry into whether the exercise of power was fair. International Shoe replaced fiction with function. A Delaware corporation headquartered in Missouri employed roughly a dozen salesmen who lived in Washington and solicited shoe orders there for years, producing a large and continuous volume of business; when Washington sued for unpaid unemployment-fund contributions measured by those salesmen's commissions, the company protested that it was not present in the state. The Court held that a defendant not present in the forum may still be sued there if it has such minimum contacts with the state that maintaining the suit "does not offend traditional notions of fair play and substantial justice"⁴.

The touchstone of the new test is reciprocity. To the extent a corporation exercises the privilege of conducting activities within a state, it enjoys the benefits and protection of that state's laws — enforceable contracts, protected property, access to the courts — and that enjoyment gives rise to obligations, including the obligation to answer in the state's courts for suits connected to those activities⁵. The test is qualitative rather than mechanical: a little more or a little less activity does not decide it, because what due process protects is fairness to the defendant, not a body count of contacts. On the facts before the Court the answer was easy — the Washington activity was systematic and continuous, and the tax obligation sued upon arose out of those very activities — so the company had to answer where it had reaped its benefits.

The opinion also sketched a spectrum that supplies the map for the rest of this chapter. Continuous in-state activity that gives rise to the claim clearly supports jurisdiction; single or occasional acts may suffice for claims arising from them, depending on their quality and nature; continuous activity so substantial that the corporation is effectively at home in the state can support suit even on unrelated claims; and casual or isolated contacts — or none — support nothing⁶. Modern vocabulary names two regions of that spectrum. Jurisdiction over claims connected to the defendant's forum conduct is specific jurisdiction, and it occupies the next three sections; jurisdiction over any claim against a defendant at home in the forum is general jurisdiction, treated later in this chapter. One feature of the spectrum deserves emphasis now: the contacts must be the defendant's own. A corporation whose only link to a state is that a customer carried its product there after an out-of-state sale has, on that fact alone, no contact with the forum at all — a point the products cases will soon make explicit.

Purposeful Availment

Specific jurisdiction has two elements: the defendant must have purposefully reached into the forum, and the claim must be connected to that reaching. This section takes up the first element, the requirement of purposeful availment, under which only the defendant's own deliberate conduct directed at the forum counts as a contact⁷. The requirement exists to give defendants control and predictability. Because jurisdiction turns on the defendant's own choices — where it sells, with whom it contracts, at whom it aims its conduct — a business can structure its affairs with some certainty about where it may be sued, and it cannot be haled into a forum by the unilateral acts of plaintiffs or strangers. The doctrine developed through a sequence of contrasting cases, and each of the four sub-sections that follow carries one rule.

A Single Deliberate Contact

In McGee v. International Life Insurance Co., a Texas insurer mailed a reinsurance offer to a California resident, collected the premiums he mailed from California until his death, and then refused to pay; his beneficiary sued in California on that very policy, and the Court upheld jurisdiction⁸. The rule is that even a single contact can suffice when the defendant deliberately created it and the claim arises from it. Quality matters more than quantity because the fairness inquiry asks whether the defendant chose to affect the forum, not how often it did so. An insurer that solicits and services a policy held by a state's resident has knowingly built a legal relationship performed in that state and has taken the economic benefit of a customer there; requiring it to answer where the policy was performed keeps companies from insulating themselves from suit by dealing with each state's residents only remotely and one at a time.

McGee marks the high-water mark of expansive jurisdiction, and two supporting themes in the opinion explain why the Court was so untroubled. California had a manifest interest in providing redress for its residents when insurers refuse to pay claims — small policyholders forced to chase an insurer to a distant state would often be priced out of any remedy — and the transformation of the national economy, with commerce increasingly conducted by mail across state lines, had made defending away from home far less burdensome⁹. The rule carries its own limit, however, because a single contact is a basis for specific jurisdiction only. The same insurer sued in California on an unrelated policy issued and performed in Texas would be beyond the state's reach, since one deliberate contact supports only the claims that arise from it.

Unilateral Acts Do Not Count

Decided months after McGee, Hanson v. Denckla supplied the limit and the canonical phrase. A Pennsylvania woman established a trust with a Delaware trustee, later moved to Florida, and carried on the trust's administration by mail from her new home until she died; when a dispute over her estate erupted, Florida asserted jurisdiction over the Delaware trustee. The Court held that Florida could not act, because the trustee had done nothing in or toward Florida: the unilateral activity of someone who claims a relationship with a nonresident defendant cannot satisfy the contact requirement, and what is essential in every case is "some act by which the defendant purposefully avails itself of the privilege of conducting activities within the forum State, thus invoking the benefits and protections of its laws"¹⁰.

The reason for the rule is structural. If a plaintiff's or a third party's movements could create jurisdiction, defendants would face suit in any state to which their counterparties happened to relocate, and the predictability the doctrine is built to protect would vanish. Requiring the defendant's own purposeful act keeps the jurisdictional trigger in the defendant's hands: the trustee never reached out to Florida — Florida came to it, in the person of the settlor. The pairing with McGee is the most teachable contrast in this area because the cases differ in nearly a single fact: who initiated the forum connection. The Texas insurer itself solicited the California resident, so the contact was the defendant's deliberate act; the Delaware trustee merely continued serving a customer who had moved, so the contact was the customer's. That one variable decides both cases, and it should be the first thing you look for in any purposeful-availment problem.

Contracts as Contacts

In Burger King Corp. v. Rudzewicz, a Michigan accountant negotiated a twenty-year franchise with a Florida corporation, agreed that Florida law would govern the relationship, and directed his fees and royalty payments to Miami; when the franchise failed and he kept operating anyway, Burger King sued him in Florida, and the Court upheld jurisdiction even though he had never set foot in the state¹¹. A contract with an out-of-state party is not by itself a contact. The Court instead demands a realistic look at the whole course of dealing — the prior negotiations, the contemplated future consequences, the contract's terms, and the parties' actual performance — to decide whether the defendant created a substantial connection with the forum¹². Physical entry is unnecessary because modern commerce runs by mail and wire: a party who deliberately creates continuing obligations with a forum enterprise has taken the benefit of doing business with that state's economy and can foresee being answerable there.

The refusal to treat a bare contract as sufficient exists for the mirror-image reason. If signing a contract with a forum party automatically created jurisdiction, every consumer who mail-ordered from an out-of-state seller would be suable at the seller's home, and the Court expressly worried about default judgments entered against distant consumers over modest purchases¹³. So the matched pair here turns on the depth of the relationship: a long-term, interdependent franchise negotiated with, governed by the law of, and paid into the forum supports jurisdiction, while a single mail-order purchase with no negotiation and no continuing relationship does not subject the buyer to suit at the seller's home. Burger King also gave specific jurisdiction its two-step articulation: once the plaintiff shows purposeful contacts giving rise to the claim, jurisdiction is presumptively reasonable, and the defendant can defeat it only by making a compelling case that other considerations — above all, a forum so gravely inconvenient that the defendant is put at a severe disadvantage — render jurisdiction unreasonable¹⁴. That allocation of burdens explains why fairness arguments rarely succeed, and why the one case in which fairness alone prevailed, treated below, is so distinctive.

Intentional Torts and the Effects Test

Two decisions handed down the same day govern contacts in intentional-tort and defamation cases. In Calder v. Jones, a Florida writer and a Florida editor produced a National Enquirer story about a California entertainer — researched through phone calls to California sources, concerning her California activities, and certain to inflict its principal harm in California, where she lived and worked and where the magazine had its largest circulation. The Court upheld California jurisdiction over the individual writer and editor based on the intended forum effects of their out-of-state conduct¹⁵. The effects test fits the purposeful-availment logic because an intentional tortfeasor who expressly aims conduct at a forum has made the forum connection deliberately: the targeting itself is the purposeful act, so the defendant can hardly claim surprise at being sued where the harm was designed to land.

The companion case, Keeton v. Hustler Magazine, shows the market-exploitation side of the same analysis. A publisher circulated ten to fifteen thousand copies of its magazine in New Hampshire every month, and the Court held it suable there for libel¹⁶. Substantial regular circulation is itself purposeful exploitation of the forum market: a publisher that sells its pages to a state's readers month after month has deliberately drawn revenue from that state, and having chosen to profit from the audience there, it can reasonably anticipate answering there for what those pages say.

Keeton also settles whose contacts the inquiry measures. The plaintiff was a New Yorker with essentially no New Hampshire ties who chose the state only because its unusually long limitations period had not yet expired, and none of that defeated jurisdiction, because the inquiry protects the defendant from an unfair forum, and a forum is fair or unfair based on what the defendant did there rather than on who the plaintiff is or why she chose the courthouse¹⁷. The test carries a matching limit on the other side: the defendant's contacts must connect it to the forum state itself, not merely to a person who happens to reside there. An out-of-state officer whose only link to the forum is that the person he allegedly wronged elsewhere lives there has aimed nothing at the forum, and the plaintiff's residence plus injury felt at home cannot substitute for conduct the defendant directed at the state.

Products in the Stream of Commerce

National and global distribution chains separate the maker of a product from the place where the product injures someone: a component made in one country is assembled into a product in a second, sold to a distributor in a third, and resold into the state where it finally fails. The doctrine must therefore decide who along that chain has availed itself of the state where the product ends up — who, in the cases' metaphor, put goods into the stream of commerce in a way that counts as serving the forum. The through-line of the three decisions in this section is that jurisdiction follows deliberate market exploitation rather than the mobility of goods. A manufacturer that cultivates a state's market can price the litigation risk of serving it; a seller who never chose the forum is spared, however far its products travel.

Foreseeability Is Not Enough

In World-Wide Volkswagen Corp. v. Woodson, New York buyers purchased an Audi from a New York dealer, and the family was severely burned when the car caught fire after a rear-end collision in Oklahoma on the way to a new home in Arizona. They sued, among others, the New York regional distributor and the retail dealer in Oklahoma — defendants who sold no cars there, advertised there not at all, and served markets that ended at the New York tri-state line. The Court held Oklahoma powerless over those two defendants even though it was plainly foreseeable that a car sold in New York might be driven to Oklahoma¹⁸. The foreseeability that matters is of a different kind: whether the defendant's own conduct and connection with the forum are such that it should reasonably anticipate being haled into court there¹⁹. The mechanism behind the distinction is stark. If a consumer's unilateral movement of a product created jurisdiction, every seller of a mobile good would be answerable in all fifty states — the chattel would in effect become the seller's agent for service of process, and amenability to suit would travel with the goods. Confining jurisdiction to markets the defendant serves lets sellers act on the risk they have chosen: they can procure insurance, pass expected costs to customers in the markets they serve, or sever their connection with a state entirely.

World-Wide Volkswagen also supplied the doctrine's architecture. Minimum contacts perform two functions: they protect defendants from the burdens of litigating in distant forums, and — as an instrument of interstate federalism — they keep states from reaching beyond the limits their status as coequal sovereigns implies²⁰. And the opinion listed the factors that measure the reasonableness of jurisdiction once contacts exist²¹:

1. the burden on the defendant;
2. the forum state's interest in adjudicating the dispute;
3. the plaintiff's interest in obtaining convenient and effective relief;
4. the interstate judicial system's interest in the efficient resolution of controversies; and
5. the shared interest of the states in furthering fundamental substantive policies.

The burden on the defendant is always the primary concern, and the next case shows the factors actually deciding an outcome. The line the case draws runs between defendants in the same chain. Had Audi's nationwide distributor served Oklahoma dealers, the injuring sale would have arisen from its efforts to serve the Oklahoma market and jurisdiction would follow — and indeed the manufacturer and the national importer, who did serve that market, did not contest Oklahoma's power. Only the regional distributor and the local dealer, whose markets ended far from Oklahoma, could not be reached merely because a customer drove there.

Asahi and the Reasonableness Factors

Asahi Metal Industry Co. v. Superior Court presented the chain at its longest. A Japanese maker of tire-valve assemblies sold its components in Taiwan to a Taiwanese tube manufacturer; the assembled tubes reached California, where one failed on a motorcycle, injuring the rider and killing his wife. By the time the case reached the Court the injured Californian had settled out, leaving only the Taiwanese company's indemnity claim against the Japanese component maker. On the contacts question the Court split four to four²². Justice O'Connor's camp required "something more" than awareness that the stream would carry products into the forum — conduct like designing the product for the forum's market, advertising there, or marketing through a forum sales agent — before placement in the stream becomes purposeful availment. Justice Brennan's camp answered that a regular and anticipated flow of products into the forum is availment enough, because a participant in that flow benefits from the forum's retail market whether or not it does anything else. Neither view has ever commanded five votes, and the lower courts split between them.

What eight Justices agreed on was the holding: even assuming sufficient contacts, California's exercise of jurisdiction was unreasonable²³. The defendant was foreign and would have to defend in an unfamiliar legal system an ocean away; the remaining dispute was an indemnity claim between two foreign companies over a transaction that occurred in Taiwan; and the forum's interest had shrunk to almost nothing once the California plaintiff settled out. Asahi is the one case in which the fairness prong alone defeated jurisdiction, and it shows why the prong exists as a safety valve: contacts measure the defendant's deliberate connection, but even a connected defendant may face a suit whose burdens are grossly out of proportion to any forum interest, and due process ultimately guards fairness in the particular case. Change one fact and the balance flips — had the injured California rider's claim against Asahi remained live, the forum's interest in protecting its residents would have weighed heavily toward reasonableness, and the burden on the foreign defendant would likely have been a price worth exacting.

McIntyre and the Single Sale

The modern restatement came, in fractured form, in J. McIntyre Machinery, Ltd. v. Nicastro. An English maker of metal-shearing machines sold through an independent Ohio distributor that served the United States as a whole; at most a handful of machines — the record suggested perhaps only one — reached New Jersey, where the plaintiff lost four fingers operating one. The Court held New Jersey without jurisdiction²⁴. Justice Kennedy's four-Justice plurality demanded conduct purposefully directed at New Jersey specifically, reasoning that jurisdiction is a question of a particular sovereign's authority and that targeting the United States as a whole is not targeting New Jersey. Justice Breyer's controlling concurrence decided the case far more narrowly: a single, isolated sale, without a regular flow of sales into the state or any forum-directed effort, has never sufficed under existing precedent, and a broad new rule should not be announced on a record that said nothing about modern marketing²⁵. Justice Ginsburg's three-Justice dissent would have held that a manufacturer seeking the entire United States market must answer wherever its products cause injury.

Because the plurality lacked a fifth vote, the working rule comes from the concurrence, and it supplies the ground to reason from when the facts fall between the poles: volume and regularity matter. A foreign manufacturer whose distributor regularly and predictably ships substantial quantities into the forum, with the manufacturer's knowledge and encouragement, likely satisfies even the concurrence's demand for something beyond an isolated transaction. One machine arriving through an independent distributor, with no forum advertising, office, or agent, does not. The isolated sale is the modern floor of the doctrine, and everything above it turns on how deliberately and how regularly the defendant's goods reach the state.

Relatedness of Claim and Contact

Purposeful contacts are only half of specific jurisdiction. The claim itself must arise out of or relate to the defendant's forum contacts, and this relatedness requirement is what keeps specific jurisdiction specific. Without it, any defendant with substantial business in a state would be suable there on anything, and the carefully policed line between specific and general jurisdiction — a line the Court has enforced strictly in the general-jurisdiction cases discussed below — would collapse²⁶. Two recent decisions define the boundary from opposite directions, and together they form a nearly perfect matched pair.

In Bristol-Myers Squibb Co. v. Superior Court, more than six hundred plaintiffs — most of them not Californians — sued in California over injuries from the drug Plavix. Bristol-Myers had sold nearly 187 million Plavix pills in California, but the nonresident plaintiffs had been prescribed the drug, bought it, taken it, and been injured entirely outside the state. The Court held that California lacked specific jurisdiction over the nonresidents' claims, rejecting the state court's "sliding scale" under which extensive but unrelated forum activity loosened the required connection between contact and claim²⁷. Jurisdiction is claim-specific and plaintiff-specific: the presence of California residents pressing identical claims could not supply the missing link for the nonresidents. The reason follows from the reciprocity idea that has run through this chapter — the exchange that justifies jurisdiction runs between the forum and the particular controversy, and California had no legitimate stake in an Ohio resident's Ohio injury, however much unrelated business the defendant did in the state. The Court also flagged, without deciding, whether the Fifth Amendment imposes the same limits when a federal court exercises jurisdiction²⁸.

Ford Motor Co. v. Montana Eighth Judicial District Court supplies the counter-limit. A Montana resident died when the tread separated on her Ford Explorer in Montana; the particular vehicle had been designed in Michigan, built in Kentucky, and first sold in Washington, and Ford argued that jurisdiction required a causal link between its Montana conduct and this specific car. The Court unanimously disagreed: the phrase "arise out of or relate to" is disjunctive, and when a company serves a state's market for the very model that injured a resident there — advertising it, selling it through dealers, and servicing it with parts and repairs — the claim relates to those contacts even though the particular vehicle arrived from elsewhere²⁹. A causation-only test would arbitrarily immunize a company that cultivates a market from suits by the very residents its marketing reaches, and it would make jurisdiction turn on the fortuity of where a used car happened to be first sold. Read together, the two cases isolate the operative variable: the nonresident in Bristol-Myers had no injury connected to the defendant's forum market, while the Montana driver was injured at home by the product Ford sold to her home market. The connection between claim and contact must be real, but it need not be but-for causal — and, as Bristol-Myers shows, "relate to" still incorporates real limits rather than licensing suit wherever the defendant does business.

General Jurisdiction

General jurisdiction is all-purpose power: a defendant at home in the forum may be sued there on any claim, wherever in the world it arose. Goodyear Dunlop Tires Operations, S.A. v. Brown introduced the modern formulation. Two North Carolina boys died in a bus crash outside Paris, allegedly because of a defective tire manufactured in Turkey by a foreign Goodyear subsidiary, and their parents sued the foreign subsidiaries in North Carolina, where some of the subsidiaries' tires had arrived through corporate affiliates. The Court held unanimously that general jurisdiction requires affiliations with the state so continuous and systematic as to render the defendant "essentially at home" there, and that a trickle of sales into a state comes nowhere near that mark³⁰.

Daimler AG v. Bauman cemented the rule. Argentine plaintiffs sued the German parent of Mercedes-Benz in California over atrocities allegedly committed in Argentina, resting jurisdiction on the substantial California sales of Daimler's American subsidiary. The Court held that the paradigm homes of a corporation are its state of incorporation and its principal place of business, and that even continuous, systematic, and substantial in-state business does not make a company at home everywhere it does such business — the inquiry compares the forum activity against the corporation's activities as a whole, and a corporation operating in many places can scarcely be at home in all of them³¹. The Court reserved the possibility of an exceptional case, on the model of a corporation forced by war to run its entire business from a temporary headquarters, making that state a surrogate home³². BNSF Railway Co. v. Tyrrell then applied the rule firmly: a railroad with more than two thousand Montana employees and thousands of miles of Montana track was still not at home in Montana, so out-of-state injuries could not be sued on there, and the federal employers' liability statute created no separate jurisdictional grant³³. For an individual, the analogue is simple: home is domicile.

The narrowness of the at-home test has its own logic. All-purpose power is fair only where the defendant's affiliation with the state is so complete that being sued there on anything is unsurprising — home is where a party enjoys the full benefits and political processes of the state and where litigation is least burdensome. Confining corporate homes to essentially two states also serves predictability, because every plaintiff and every defendant can identify in advance where general jurisdiction lies, and it prevents the old doing-business theory — under which a national corporation was treated as suable everywhere it operated — from swallowing the specific-jurisdiction framework and its careful contact rules³⁴. One distinct route remains outside this framework: whether a state may exact consent to all-purpose jurisdiction through its corporate registration statute travels a different doctrinal path, grounded in consent rather than contacts, and the at-home test does not settle it.

Jurisdiction Based on Property

The property cases use three labels, and the labels matter because only one category was truly threatened by the modern framework. An action in rem adjudicates the rights of everyone in the world in a thing located in the state — a quiet-title action or a forfeiture proceeding. A quasi in rem action of the first type adjudicates the parties' competing rights in forum property when the dispute is about that property. A quasi in rem action of the second type attaches property that has nothing to do with the dispute, using it purely as a hook to force the absent owner to litigate a personal claim, with recovery capped at the property's value. Under the old territorial regime all three were routine, because the state's power over the thing was treated as distinct from power over its owner.

Shaffer v. Heitner ended that separation. A shareholder brought a derivative suit in Delaware against Greyhound's officers and directors over conduct in Oregon, and obtained jurisdiction by sequestering the defendants' Greyhound stock — property "located" in Delaware only because a Delaware statute deemed the place of incorporation the situs of all shares. The Court held that all assertions of state-court jurisdiction, including those nominally directed at property, must be evaluated under the International Shoe standard, because an action against property is in reality an action against the interests of its owner³⁵. The old regime rested on a fiction: calling the proceeding one against the thing obscured that the judgment stripped a human owner of rights, and it let plaintiffs evade the fairness limits on personal jurisdiction by locating any asset — a debt, a bank account, shares deemed present at the place of incorporation — inside the forum. If the state could not fairly command the owner directly, it should not be able to do so indirectly through his property.

The results sort cleanly along the taxonomy. Quasi in rem jurisdiction of the second type is effectively dead where the owner lacks minimum contacts — Shaffer itself is the illustration, since the attached stock was unrelated to the derivative claims and present in Delaware only by statutory fiat³⁶. True in rem actions and the first quasi in rem type usually survive, because the property's presence is itself a claim-related contact: a dispute over title to forum land, or an injury suffered on forum property, proceeds in the forum precisely because owning or using property there is a purposeful connection to the state that gave rise to the claim. One interaction closes the loop with the start of this chapter. Shaffer's statement that all assertions of jurisdiction face the minimum-contacts standard might have swept away tag jurisdiction as well, but Burnham later confined that language to absent defendants, so service on a defendant physically present in the state survives as an independent basis³⁷. The distinction the two cases draw together is between fictional presence — property standing in for an absent owner — and the actual physical presence that has anchored jurisdiction from the beginning.

Raising and Waiving the Defense

In federal court, the defense of lack of personal jurisdiction is asserted either by pre-answer motion under Rule 12(b)(2) or as a defense included in the answer³⁸. On such a motion the court runs the two-step analysis this chapter began with: it asks first whether the forum's long-arm statute authorizes jurisdiction, and then whether the exercise satisfies due process. The rule expressly protects a defendant who bundles objections: no defense is waived by joining it with other defenses in a motion or responsive pleading³⁹, so a defendant may attack jurisdiction and the sufficiency of the complaint in one filing without risk.

What the defendant may never do is hold the objection back. A party who makes a Rule 12 motion may not make a second Rule 12 motion raising a defense that was available but omitted from the first⁴⁰, and the personal-jurisdiction defense is waived by omitting it from such a motion or by failing to include it in the responsive pleading⁴¹. The two poles are easy to state. A defendant whose first motion asserts only failure to state a claim under 12(b)(6), and who then tries to raise personal jurisdiction in the answer, has lost the defense forever. A defendant whose first motion asserts both 12(b)(2) and 12(b)(6) preserves the objection, and if the motion is denied it may litigate the merits without forfeiting the jurisdictional point for appeal. The waiver rule follows from the nature of the right. Because personal jurisdiction protects the defendant's individual liberty interest rather than the structure of the courts, the defendant may relinquish it, and litigating on the merits without objection is itself a form of consent — the defendant is invoking the very judicial power it claims does not exist. Requiring the objection at the threshold also prevents sandbagging: a defendant should not be able to test the merits, lose, and only then produce a jurisdictional objection that erases the whole effort.

The consolidation system replaced the common-law special appearance, under which a defendant had to appear solely to contest jurisdiction, and any misstep — raising even one additional issue — converted the appearance into a general one and consent to the court's power; Rule 12(b) removed that trap while keeping the raise-it-first discipline. The contrast with subject-matter jurisdiction is now complete: if the court determines at any time that it lacks subject-matter jurisdiction, it must dismiss the action⁴², with no waiver ever, because that limit belongs to the court system and not to the parties. One alternative to appearing remains. A defendant may ignore the suit entirely, suffer a default judgment, and then attack the judgment collaterally as void for want of personal jurisdiction when the plaintiff tries to enforce it. That course is a gamble that stakes everything on the jurisdictional question: the defaulting defendant forfeits every defense on the merits, so if the second court finds that jurisdiction existed, the judgment stands in full.