Tort law (2022): Property torts: Trespass to chattels

Trespass to chattels is a tort whereby the infringing party has intentionally (or, in Australia, negligently) interfered with another person's lawful possession of a chattel (movable personal property). The interference can be any physical contact with the chattel in a quantifiable way, or any dispossession of the chattel (whether by taking it, destroying it, or barring the owner's access to it). As opposed to the greater wrong of conversion, trespass to chattels is argued to be actionable per se.

The origin of the concept comes from the original writ of trespass de bonis asportatis. As in most other forms of trespass, remedy can only be obtained once it is proven that there was direct interference regardless of damage being done, and the infringing party has failed to disprove either negligence or intent.

In some common-law countries, such as the United States and Canada, a remedy for trespass to chattels can only be obtained if the direct interference was sufficiently substantial to amount to dispossession, or alternatively where there had been an injury proximately related to the chattel. (Restatement (Second) of Torts, 1965.)

United States law.

The Restatement of Torts, Second § 217 defines trespass to chattels as "intentionally… dispossessing another of the chattel, or using or intermeddling with a chattel in the possession of another." Harm to personal property or diminution of its quality, condition or value as a result of a defendant's use can also result in liability under § 218(b) of the Restatement.

Certain specific circumstances may lend themselves to liability for the action. The Restatement (Second) of Torts § 218 states further that:

One who commits a trespass to a chattel is subject to liability to the possessor of the chattel if, but only if,

a. he dispossesses the other of the chattel, or

b. the chattel is impaired as to its condition, quality, or value, or

c.  the possessor is deprived of the use of the chattel for a substantial time, or

d. bodily harm is caused to the possessor, or harm is caused to some person or thing in which the possessor has a legally protected interest.

The trespass to chattels cause of action, frequently asserted in recent years against Internet advertisers and email spammers, is often included in complaints against spyware companies. These electronic messaging cases, and their progeny, which have cropped up over the last decade, will typically turn on the situations described in (b) or (d), and, as detailed below, the question of harm caused is a big issue.

In sum, the basic elements of a claim of trespass to chattels are: 1) the lack of the plaintiff's consent to the trespass, 2) interference or intermeddling with possessory interest, and 3) the intentionality of the defendant's actions. Actual damage is not necessarily a required element of a trespass to chattels claim.

Features of the claim.

Lack of consent.

A vendor can attempt to dispute a trespass claim on the grounds that the user consented to the terms of the contract. Even if consent was given for certain access, a user may still have a valid trespass to chattels complaint if the vendor has exceeded the contractual terms, if the contract is found to misrepresent the actual functioning of the product, or if the consent has been withdrawn. A vendor can be held liable for "any use exceeding the consent" given.