A civil-wrong concept defining liability rules for compensating harm or preventing wrongful interference with protected interests. It specifies required elements such as duty, prohibited conduct, causation, and legally cognizable harm or defines protection of commercial and intangible interests where applicable. It does not impose liability where the required element set is not satisfied or where recognized privileges or defenses apply. It allocates responsibility for injury or interference and shapes the scope and measure of monetary and equitable relief. The concept is generally stable, though doctrinal refinements and statutory updates may alter elements or defenses over time.

Principle

Prevent the unfair appropriation of reputation and customer reliance by requiring truthful origin information; the remedy rests on preventing consumer deception rather than on registration of a mark.

Demonstration

A local chocolatier develops distinctive packaging and is harmed when a competitor sells lower-quality confections in nearly identical wrappers, causing customers to buy the competitor’s product thinking it is the chocolatier’s.

Misapplication

Treating any similarity between products as passing off without showing goodwill, public confusion, or a deliberate or negligent misrepresentation of origin.

Consequence

When established, courts may order injunctive relief, delivery up or destruction of infringing goods, damages or an account of profits, and corrective publicity to restore reputation and prevent further deception.

Reversal

The inverse is permitting close imitation absent deception, which accepts market free-riding and shifts risk to consumers to distinguish sources.

Boundary

A tort grounded in reputation and consumer confusion in common-law jurisdictions; it is distinct from statutory trademark infringement, criminal fraud, or mere competitive similarity that does not mislead the public.

Semantic Tension

Overlaps with trademark infringement and unfair competition doctrines; the tension lies in passing off’s focus on goodwill and deception versus trademark law’s reliance on statutory rights and registration.

Synthesis

Passing off is an equitable common-law tool that forbids commercial misrepresentations that appropriate another’s goodwill by causing consumer confusion about origin, yielding equitable remedies aimed at stopping deception and redressing reputational harm.