Definition
Privity is a legal relationship between parties that arises from their mutual or successive connection to the same rights, obligations, or property. It determines who may sue or be sued on a contract, claim the benefit of a judgment, or be bound by a covenant. The term operates across several distinct legal contexts, each with its own rules and consequences.
1. Privity of contract: The relationship between the original parties to a contract. Only those in privity of contract could traditionally sue to enforce it or be held liable under it. A third party who benefits from a contract but is not a party to it has no privity and, at common law, no right of action.
2. Privity of estate: The relationship between parties who hold successive or simultaneous interests in the same land. A landlord and tenant are in privity of estate during the tenancy; an assignor and assignee stand in privity through their connected interests in the same property. Privity of estate matters most in determining whether covenants attached to land will "run with" it and bind or benefit future owners.
3. Privity of blood (or privity in law): The relationship between an heir and ancestor, or between an executor and testator — parties connected by operation of law rather than agreement.
4. Privity of knowledge or notice: In admiralty and limitation-of-liability contexts, "privity or knowledge" refers to a shipowner's personal awareness of, or participation in, the fault or condition giving rise to a loss. This usage is functionally distinct from the property and contract senses of the word.
Common Language
Modern common usage (Wiktionary): Privacy, secrecy; a private matter or secret; the genitals; knowledge or compliance implying consent.
Historical common usage (Webster's 1913): "Privacy; secrecy; confidence" and "private knowledge; joint knowledge with another of a private concern; cognizance implying consent or concurrence."
The common usage centers on secrecy, intimacy, and private knowledge — the idea of being "privy to" something. The legal term has almost entirely shed this connotation. In law, privity is about relational standing and legal connection, not secrecy. A researcher encountering "privity" in older legal texts should resist the pull of the common meaning; a party in privity with another is not merely someone who knows about a transaction but someone legally bound to or entitled through it.
Common Confusion
Privity is frequently confused with privity of contract specifically, but the term is broader. The failure to distinguish privity of contract from privity of estate is a persistent source of error in real property research: the two concepts operate differently, require different elements, and produce different outcomes when analyzing whether a covenant runs with the land. Horizontal privity (between original covenanting parties and their connection to the land) and vertical privity (between an original party and a successor) are subdivisions of privity of estate, not privity of contract.
The admiralty usage — "privity or knowledge" — is a term of art that does not map onto either property or contract privity. Conflating the admiralty sense with the others will produce analytical confusion when working across subject areas.
Recognized Forms
/SUBTYPES
Horizontal privity: The relationship between the original parties to a covenant and their connection to the burdened or benefited land at the time the covenant was made. Required in most American jurisdictions for a real covenant to run at law.
Vertical privity: The relationship between an original covenanting party and a successor in interest to the same land. Generally required for the benefit or burden of a real covenant to pass to successors.
Privity of contract: The direct contractual relationship between parties to an agreement.
Privity of estate: Mutual or successive interests in the same land, independent of contract.
Privity of blood / privity in law: Relationship arising by operation of law, as between heir and ancestor or executor and testator.
Privity or knowledge (admiralty): A shipowner's personal participation in, or actual awareness of, the negligence or unseaworthiness giving rise to a claim — the standard governing the right to limit liability.
Why It Matters in Research
The central research trap with privity is that historical sources treat it almost exclusively as a property concept, while modern litigation most often implicates privity of contract in products liability, third-party beneficiary, and warranty contexts. A researcher moving from historical sources into twentieth-century case law will find that the doctrine's center of gravity shifted substantially.
In property research, privity's role diverged between law and equity: equity courts developed equitable servitudes precisely because they did not require the horizontal privity demanded at law. The Law Mind Property encyclopedia entries on real covenants and equitable servitudes should be read together — the contrast between the two doctrines turns almost entirely on what privity requirements apply.
The erosion of privity of contract as an absolute bar is a major doctrinal development of the twentieth century, particularly in tort law and products liability, where courts progressively abandoned the privity requirement for personal injury claims. Researchers examining pre-1916 sources will find privity treated as a nearly impenetrable barrier; post-1960s sources may reflect its substantial decline or statutory abrogation in many contexts.
In admiralty, "privity or knowledge" under the Limitation of Liability Act is a statutory standard with its own developed body of case law. The admiralty meaning is historically stable but technically distinct, and the encyclopedia entry on shipowner limitation of liability covers this usage separately.
When using historical dictionaries for privity, be aware that the definitions are compressed and property-centric. They will not prepare a researcher for the contract or admiralty variants.
Historical Dictionary Support
The historical sources agree on a core definition: privity is the mutual or successive relationship to the same rights of property. Black's (both editions) and Bouvier's are closely aligned, with Bouvier citing Greenleaf's Evidence for the same formulation. Burrill adds "connection; interest; mutuality of interest" — a slightly broader framing that gestures toward the relational character of the concept without departing from the property focus.
Rapalje & Lawrence's entry was apparently lost or misdirected in the available text; the fragment reproduced relates to debt priority and is not useful for this term. Anderson's Dictionary of Law refers the reader to "PRIVY, 2," reflecting the older lexicographic practice of cross-referencing related headwords rather than providing independent definitions.
What the historical dictionaries collectively miss: the contract privity doctrine as a standalone concept developed through common law courts as a separate operational rule. By the time these dictionaries were compiled, that doctrine was well established in English and American courts, but the dictionary entries do not foreground it. A researcher relying solely on historical dictionary sources would come away with a primarily property-law understanding of privity, missing the contract dimension almost entirely — and missing the admiralty usage altogether.
Jurisdictional Note
Horizontal privity requirements for real covenants vary by state and remain contested. Some jurisdictions have relaxed or abandoned horizontal privity requirements, bringing their treatment of covenants closer to the equity standard for equitable servitudes. In admiralty, "privity or knowledge" is a federal statutory standard applied by federal courts, and state-law variations do not apply.
Encyclopedia Cross-Reference
Real Covenants — Running with the Land (Horizontal and Vertical Privity) (The Law Mind Property Law Encyclopedia)
Equitable Servitudes — Creation and Requirements (No Privity Required) (The Law Mind Property Law Encyclopedia)
Limitation of Liability — Shipowner's Right to Limit, Privity or Knowledge, and the Limitation Fund (The Law Mind Military, Veterans & Admiralty Law Encyclopedia)