Privity of contract is a foundational principle of the common law of obligations, particularly in English, Commonwealth, and (with modifications) United States jurisprudence. The classical rule has two limbs: a third party cannot acquire rights under a contract to which it is not a party, and a contract cannot impose burdens on a third party without consent.
The doctrine was crystallised in Tweddle v Atkinson (1861) 1 B&S 393, where a groom could not enforce a payment promise made between his father and father-in-law, and reaffirmed by the House of Lords in Dunlop Pneumatic Tyre Co Ltd v Selfridge & Co Ltd [1915] AC 847. Lord Haldane there linked privity tightly to the doctrine of consideration: only a party who has furnished consideration may sue.
The rigidity of the rule generated long-standing criticism, especially where contracts were plainly intended to benefit a third party (insurance, construction chains, carriage of goods). The United Kingdom largely reformed the position through the Contracts (Rights of Third Parties) Act 1999, which permits a third party to enforce a term if the contract expressly so provides or if the term purports to confer a benefit on them, unless the parties did not intend it to be enforceable. Similar statutory reforms exist in Singapore (Contracts (Rights of Third Parties) Act 2001), Hong Kong (2014 Ordinance), and New Zealand (Contract and Commercial Law Act 2017, consolidating the 1982 Act).
The United States departed earlier through Lawrence v Fox, 20 N.Y. 268 (1859), recognising third-party beneficiaries, a position systematised in the Restatement (Second) of Contracts §§302–315.
For IR and MUN researchers, privity matters when analysing why treaties bind only states parties (a parallel principle codified in Articles 34–36 of the Vienna Convention on the Law of Treaties 1969, pacta tertiis nec nocent nec prosunt), and when assessing private cross-border commercial agreements, investor–state contracts, and supply-chain liability.
Example
In *Dunlop v Selfridge* [1915], the House of Lords held that Dunlop could not enforce a minimum resale price clause against Selfridge because Dunlop was not a party to the contract between Selfridge and the intermediate dealer Dew & Co.
Frequently asked questions
Yes. The Contracts (Rights of Third Parties) Act 1999 creates statutory exceptions but does not abolish the doctrine; the default common-law rule remains that only parties can sue, unless the Act or another exception applies.
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