Facts of the Case
Adams v Lindsell is the foundational authority for the “postal rule” in English contract law, establishing that an acceptance sent by post is effective at the moment it is posted, rather than when it is received.
On 2 September 1817, the defendants (wool sellers) sent a letter to the claimants (wool manufacturers) offering to sell a quantity of fleeces. The offer requested an answer “in course of post”. However, the defendants misdirected the letter, addressing it to the wrong county (Leicestershire instead of Worcestershire) [549–550].
As a result, the claimants did not receive the offer until 7:00 p.m. on Friday 5 September. They immediately posted a letter of acceptance that same evening. Under the ordinary course of post, had the offer not been misdirected, the defendants would have expected a reply by 7 September. Having heard nothing by the 8th, the defendants sold the wool to a third party [550–551]. They finally received the claimants’ acceptance on 9 September.
Decision and the “Postal Rule”
The court held that a binding contract was formed on the evening of Friday 5 September, the moment the claimants posted their acceptance. Lord Ellenborough reasoned that if the law required the offeror to be notified of the acceptance before a contract was complete, no contract could ever be concluded by post; the offeree would not be bound until they knew their acceptance was received, and the offeror would then have to confirm they received that knowledge, creating an infinite chain.
Discussion and Commentary
Some interesting points emerge from the decision in Adams v Lindsell that are worth considering in a bit more detail:
- Allocation of Risk: A major factor in the decision was the defendants’ own error. Because they misdirected the offer, the court held they must bear the risk of being bound by a contract before they were actually notified of the acceptance.
- The “Open and Alive” Theory: Lord Ellenborough emphasized that the offer remained “open and alive” at every moment the letter was travelling, allowing the claimants to “complete” the contract by posting their reply.
- Historical Context: Academic commentary notes that the rule was solidified during the 1840s, a period of massive innovation in the postal system (such as the uniform penny post and the introduction of the adhesive stamp) [470–472]. During this era, there was a “notional equation” of posting a letter with its delivery.
- Criticism and Rationality: The rule is often described as arbitrary and has been criticized for favouring the offeree. However, it serves a practical function by limiting the offeror’s power to withdraw an offer once the offeree has committed their acceptance to the post.
- Modern Marginalization: In the contemporary era, the postal rule is increasingly marginalized. It is considered an exception to the general rule that acceptance must be communicated. It does not apply to instantaneous communications (telex, fax, email, or WhatsApp), which generally require the acceptance to be received by the offeror to be effective [390–391, 460].
Related Cases
- Dunlop v Higgins (1848): The House of Lords decision that firmly secured the postal rule’s place in English law.
- Byrne & Co v Van Tienhoven & Co (1880): Established that while acceptance is effective upon posting, the revocation of an offer is only effective upon actual communication to the offeree.
- Household Fire and Carriage Accident Insurance Co Ltd v Grant (1879): Confirmed that the postal rule applies even if the letter of acceptance is lost in the post and never reaches the offeror [447–448].
- Henthorn v Fraser (1892): Clarified that the rule applies whenever it is within the contemplation of the parties that the post might be used as a means of communicating acceptance.
- Holwell Securities Ltd v Hughes (1974): Established that the postal rule can be excluded by the express terms of the offer (e.g., requiring “notice in writing”) or if its application would cause “manifest inconvenience or absurdity”.
- Entores Ltd v Miles Far East Corporation (1955): Leading authority that the postal rule does not apply to instantaneous communications; acceptance via telex is only effective when received.
- Brinkibon Ltd v Stahag Stahl (1983): The House of Lords approved Entores, affirming that instantaneous communications require receipt.
- Thomas v BPE Solicitors (2010): A recent example indicating that emails are treated as instantaneous communications and thus fall outside the scope of the postal rule.