Concept
Preventing Trespass or Theft
Defense of property
Preventing Trespass or Theft
Paragraph (1)(a) of § 3.06 is the provision for an actor who still holds what is being threatened. It justifies force the actor believes is immediately necessary to prevent or terminate an unlawful entry or other trespass on land, or a trespass against or unlawful carrying away of tangible movable property. The land or property must be, or be believed by the actor to be, in the actor's possession or in the possession of another person for whose protection the actor acts.1 The sentence has two working parts. The first describes the intrusion that triggers the right, and the second identifies whose hold on the property the right protects. The two subsections that follow take those parts in turn, and this overview explains why the paragraph is built that way.
The privilege exists because the person in possession is on the spot when an intrusion begins and is often the only one who can stop it before the harm is done. A call to the police will not halt a theft that is over in seconds, and a lawsuit afterward cannot undo it. The law therefore gives the possessor a limited measure of self-help against imminent intrusions. The interest being protected is property, though, and property is valued below the safety and bodily integrity of human beings, so the privilege is narrower than self-defense.2 The justification also has a moral structure that explains who may be hurt. Force under this paragraph falls on a person who created the risk by entering or taking, which separates it from the necessity privilege, where the harm falls on someone who did nothing to bring the danger about.3
Each half of the paragraph has its own logic. The trigger requires an unlawful entry, trespass, or taking because the force borrows its justification from the other person's wrong. If the other person has no wrong to answer for, nobody culpable exists to bear the harm, and the owner's force is just an assault or battery. The possession proviso does different work. An intrusion disturbs possession, which is the thing the intruder actually interferes with, and possession is usually something the actor can know in the moment. Title is often a matter of records and legal argument, so a rule that required the actor to be sure of ownership would be useless in the seconds available, and a rule that let an actor use force on a bare claim of ownership would turn property disputes into fights that courts exist to resolve. The Code defines possession for these purposes in subsection (2), and the children below develop that definition.4 Students lose this issue when they ask who owns the property instead of asking who possesses it, or is believed to.
The paragraph is aimed at theft and trespass, and the boundary matters because the neighboring crimes follow different rules. If Ada sees Betty grabbing Ada's lawfully possessed laptop, or sneaking onto Ada's lawfully possessed land, Ada may use reasonable force to prevent or terminate the intrusion, but never deadly force.5 A robbery involves assaultive conduct toward the victim, so the victim will ordinarily rely on the conventional rules of self-defense. A burglary raises a different question again, because the right to use force depends on what crime the burglar is threatening and also engages the defense-of-habitation doctrine taken up at the end of this chapter.6
Paragraph (1)(a) also opens the door and nothing more. The lead-in still requires a belief that force is immediately necessary, the grant remains subject to § 3.09, and paragraph (3) imposes its own limits, including the bar on deadly force to protect property alone. The first question under (1)(a) is what counts as a trespass or a taking, and that is where the next subsection begins.
Trespass and Taking
Paragraph (1)(a) describes its triggering event in two vocabularies, one for land and one for things. On land, the trigger is "an unlawful entry or other trespass"; on tangible movable property, it is "a trespass against or the unlawful carrying away of" the property.9 The verbs that govern both, prevent and terminate, cover two different moments. To prevent an intrusion is to stop it as it begins, as when a stranger is pushing open the gate. To terminate it is to end one already under way, as when the stranger is standing in the yard or a thief is walking off with a laptop. The paragraph needs both verbs because an owner often notices an intrusion only a moment before it starts or a moment after it has begun, and a rule limited to one of those moments would leave the owner without a remedy in the other.
Begin with land. In ordinary terms, trespass is an unauthorized entry onto land in another's possession that interferes with the possessor's exclusive hold on it.10 The paragraph does not define the word itself, so its meaning in the law of trespass supplies the content. Under that meaning the entry need not do any damage. At common law every unauthorized and direct breach of another's boundaries was actionable, and any trespass supported at least nominal damages even where no harm was shown.11 The law took that strict view because possession is the interest at stake, and an entry disturbs possession whether or not a blade of grass is bent. For the owner the consequence is a window to act early: since harm is not required, the possessor need not wait for the damage, which is the point at which the chance to prevent it has already passed.
The point is clearest in Dougherty v. Stepp, where the defendant entered the plaintiff's unenclosed land with a surveyor and chain carriers and surveyed part of it, claiming it as his own, without marking trees or cutting bushes. The trial judge told the jury that this was no trespass, and the jury found for the defendant.12 The state supreme court reversed, reasoning that every unauthorized entry into another's land is a trespass, that the law infers some damage from any entry against the possessor's will, and that a willful entry on an unfounded claim of right is no more innocent than the entry of someone who claimed nothing.13 Dougherty is a civil case about damages, yet it shows what the word means when § 3.06(1)(a) uses it: the entry must be unauthorized, and no showing of harm or bad faith is added to that. The trap is to hunt for damage when the question is whether anyone authorized the entry. A quiet, harmless entry therefore opens the door to paragraph (1)(a), although it does not decide what force, if any, is justified, since the necessity requirement and the limits in paragraph (3) still apply.
The reference to other trespass reaches beyond the act of stepping over a boundary. Trespass also includes remaining on land after the right to be there has ended, failing to remove a thing one is obliged to remove, and causing a thing or another person to enter.14 Unauthorized grazing of cattle, an encroaching fence, and cutting timber on another's land are familiar illustrations of how wide the word runs.15 Two features of trespass carry over to this paragraph. The entrant must intend the act of entering but need not intend a wrong, and an honest belief in a right to enter is no defense unless the possessor caused the mistake.16 The second feature matters because the entrant who sincerely thinks the land is open to him is still a trespasser, and the trigger is met even though the limits taken up later, especially the request to desist, will shape how an owner may respond to such a person.
The movable-property clause names two wrongs. A trespass against property is an interference with the possessor's hold on a thing, and the possessor is privileged to prevent such an intrusion on chattels just as on land.17 The unlawful carrying away is the familiar theft, in which the thing is lifted out of the possessor's control and removed.18 The text limits the clause to tangible, movable property, which means physical objects that can be handled and carried off, such as a laptop, a bicycle, or tools in a shed. Land has its own clause, so the two clauses divide the field between the ground and the things that can be carried away from it. The wrong takes a different form in each, an entry for land and an interference or removal for things, but in both the possessor faces someone who is disturbing a hold that the law protects.
Both clauses require an actual intrusion or a threat of immediate interference with the possessor's hold.19 Suspicion and irritation do not meet that requirement. A person lingering on the public sidewalk has entered nothing and taken nothing, so there is no trespass to prevent until a step onto the land or a hand on the property is imminent. This timing matches the lead-in's requirement of immediate necessity, and the two operate together. At the far end, once the intrusion is over, as when the thief has left the property with the laptop, nothing remains to terminate, and the possessor's options fall under the retaking provisions of paragraph (1)(b), which come later in this chapter.
The word unlawful in the land clause has one more consequence, which is that force under this paragraph borrows its justification from the other person's wrong. An entry the law permits has no wrong to borrow from, so the owner's force against that entrant is just an assault or battery. An entry made with the possessor's consent is not unauthorized, and some entries are privileged by law, so neither an invited guest nor a person with a legal right to enter is within the paragraph.20 The paragraph is triggered by an actual invasion of the protected interest, and the right it creates does not extend to people the possessor has welcomed.
The trigger in paragraph (1)(a) is therefore broad in one direction and narrow in the other. It is satisfied by any unauthorized entry or taking, however harmless and however sincere the intruder's belief in a right, and it is not satisfied by consensual or privileged entries or by conduct that has not yet reached or has already left the property. Whose property is being protected, and on what footing, is the proviso that the next subsection takes up.
Possession Requirement
The grant in paragraph (1)(a) carries a proviso: the land or movable property must be, or be believed by the actor to be, in the actor's possession or in the possession of another person for whose protection the actor acts.22 This possession requirement holds three ideas in one clause. The protected interest is possession, which subsection (2) defines; the actor's belief about possession can satisfy the proviso; and the possession protected may belong to someone other than the actor. The requirement is separate from the trigger covered in the last subsection, so a real trespass or taking still leaves the actor without a privilege under (1)(a) unless the proviso is met. The paragraphs below take the three ideas in that order.
The proviso speaks of possession and never of ownership, and the choice has a mechanism behind it. Disputes about title are disputes about who has the better claim, and each side to such a dispute usually believes its own claim is the better one. A privilege that turned on title would therefore authorize both sides to use force against each other, each relying on a claim no court had yet resolved. Possession is a present fact about who holds or controls the thing, the intruder's act disturbs exactly that fact, and the actor can usually see it in the moment.23 Once possession has been lost, what remains is a dispute about entitlement, and entitlement disputes go to court except in the narrow retaking situations that paragraph (1)(b) allows.24 The consequence runs in both directions: an owner who has lost possession has no privilege under (1)(a), and a non-owner who holds possession, such as a borrower or a licensee, does.
Compare the earlier example in which Betty grabs a laptop that Ada lawfully possesses. The intrusion is the same, a person walking off with a laptop, and the one changed fact is who holds it, which moves Ada from the privilege of (1)(a) to the separate retaking rules of (1)(b).25 Because that single fact decides which rule applies, the definition of possession carries real weight. Subsection (2) supplies it in three clauses, each answering a question that arises when possession is contested.26
The first clause addresses property that has left the actor's hands. A person who has parted with custody of property to another who refuses to restore it is no longer in possession, unless the property is movable and was and still is located on land in that person's possession.27 The general rule follows from what possession is: once a borrower carries a thing away and declines to return it, the borrower holds it and the lender has only a claim to get it back, which is the kind of claim a court resolves. The exception keeps the lender in possession where the borrower's hold never leaves the lender's premises, because the lender's control of the land still reaches the thing.
The second clause concerns land. A person who has been dispossessed of land does not regain possession merely by setting foot on it.28 Possession of land is a matter of control, and a single step across the boundary does not restore control to someone who has been shut out. If it did, a dispossessed owner could convert the occupier's possession into the owner's own by walking onto the lawn, and the occupier would lose the privilege to resist at the very moment the dispute turned physical. Under the clause the occupier keeps possession until the dispossessed person actually retakes control, and a dispossessed person who wants to use force to get back in must satisfy the retaking provisions of paragraph (1)(b), which come next in this chapter.
The third clause protects people who occupy by permission. A person who holds a license to use or occupy real property is deemed to be in possession of it, except against the licensor acting under a claim of right.29 Without this clause, someone living in a friend's cabin for the winter would hold no title and could claim no privilege against a stranger who walked in, although the occupant is the person on the spot and the only one able to act before harm is done. The exception exists because the license rests on the licensor's consent. Against a licensor who is asserting a claim of right, the licensee has no superior hold to protect, and the dispute is once more one about entitlement that belongs in court.
Possession can be hard to read from the outside, and an actor who must react in seconds cannot always confirm it. For that reason the proviso is satisfied when the property is believed by the actor to be in the relevant possession, as well as when it actually is.30 A rule demanding actual possession would expose an actor to liability for force used under a reasonable mistake about who currently holds a thing, such as whether a borrower has returned it, even though the actor did what the law invites an on-the-spot possessor to do. The belief language therefore directs attention from what a court later finds about custody to what the actor believed at the moment of acting. Two limits keep that from becoming a loophole. The belief must be about possession as subsection (2) defines it, so a person who knows custody has passed to another, or who believes only that he owns the thing, has not satisfied the proviso. And the lead-in makes the whole privilege subject to § 3.09, the section that handles mistaken beliefs, so the question of how careless a belief may be and still protect the actor is answered there.31
The proviso's last alternative lets the actor protect property in the possession of another person for whose protection the actor acts.32 A person minding a friend's bicycle, or an employee watching an employer's stock, can therefore act without waiting for the possessor to return. The Code's approach rests on the conclusion that there is no adequate reason to confine the privilege to the person whose property is threatened, while many state statutes do confine it to the possessor or to people with a legal duty, an owner's request, or a family tie.33 Those narrower statutes reflect two judgments: that mistakes about the disputants' respective rights are more likely when property is at stake, and that property deserves less protection than persons, so violence by strangers in its defense should not be encouraged.34 The Code answers by placing the helper in the possessor's shoes, with the same privilege and no more, since the necessity belief, the request to desist, and the deadly-force limit all apply to the helper as they would to the possessor.35 The requirement still concerns possession, because the helper's authority comes from the protected person's hold on the thing.
Taken together, the proviso asks who holds the property when the intrusion occurs, or who the actor believes holds it, and it does not ask who owns it. Students lose this issue when they reason that an owner out of possession keeps the privilege because title is clear. The seller of the laptop, the lender whose borrower walked off with the drill, and the locked-out tenant standing on the porch each hold a claim and no possession, so each must look to the retaking rules of paragraph (1)(b) taken up in the next section.36