Introduction
This essay examines a complex contractual scenario involving Seller Ltd and Buyer Ltd under the principles of English contract law, focusing on the formation, acceptance, and potential revocation of an offer. The situation described raises critical questions about the timing of acceptance, the effectiveness of communication, and the implications of revocation in the context of the postal rule and modern methods such as fax. The purpose of this discussion is to analyse whether a valid contract was formed between the parties, to evaluate the legal impact of Buyer Ltd’s attempt to countermand the order, and to assess the consequences for Seller Ltd’s decision to reject an alternative offer. By exploring relevant case law and legal principles, this essay will provide a reasoned analysis of the issues, demonstrating an understanding of offer, acceptance, and communication in contract law.
Offer and Acceptance: Formation of a Contract
The foundation of any binding contract under English law requires a valid offer, acceptance, consideration, and an intention to create legal relations (Beale, 2012). In this scenario, Seller Ltd’s fax on Monday constitutes a clear offer to sell 1,000 widgets for £10,000, with a specified deadline of 5 pm on Friday. This meets the criteria of an offer as defined in cases such as *Carlill v Carbolic Smoke Ball Co* (1893), where an offer must be specific and capable of acceptance.
Buyer Ltd’s response on Tuesday, posting a letter of acceptance, engages the postal rule, a well-established principle in contract law. According to Adams v Lindsell (1818), acceptance is effective as soon as a letter is posted, provided it is properly addressed and stamped. Thus, arguable, a contract was formed on Tuesday when Buyer Ltd posted their acceptance, assuming the letter met these conditions. This principle prioritises certainty in commercial dealings, as the offeror (Seller Ltd) bears the risk of delays in postal communication (Treitel, 2015). However, the postal rule’s application can be limited if the offeror stipulates a different method or timing for acceptance, which does not appear to be the case here since Seller Ltd specified only the deadline for the offer’s validity.
The Postal Rule and Timing of Acceptance
A key issue arises regarding when Seller Ltd became aware of the acceptance. The letter was delivered to Seller Ltd’s office on Wednesday at 12 noon and read at 2 pm. Under the postal rule, however, the timing of receipt or reading is irrelevant; the contract is binding from the moment of posting on Tuesday (Byrne, 2010). This creates a potential mismatch between legal obligation and practical awareness, as Seller Ltd was unaware of the acceptance when they turned down Tertius Ltd’s offer at 3 pm on Wednesday. The law prioritises the moment of dispatch over receipt to protect the acceptor from uncertainty caused by delays beyond their control. Therefore, it is likely that a contract was formed between Seller Ltd and Buyer Ltd before Seller Ltd received or read the letter, binding them to the terms of the offer.
Attempted Revocation by Buyer Ltd
On Wednesday morning at 9 am, Buyer Ltd, upon learning of the Dutch company’s financial difficulties, sent a fax to countermand the order. Revocation of acceptance is generally not permissible under English law once acceptance has been effectively communicated, as established in *Payne v Cave* (1789), where a bid (akin to an offer or acceptance in some contexts) could only be withdrawn before final acceptance. Since the postal rule deems acceptance effective upon posting, Buyer Ltd’s attempt to revoke via fax is arguably ineffective unless Seller Ltd had not yet relied on the acceptance or suffered detriment (Treitel, 2015).
Furthermore, the fax was received into memory on Wednesday but not read until Thursday due to the machine being out of paper. This raises the question of when, or if, the revocation was communicated. In The Brimnes (1975), it was held that communication of a message via electronic means is effective when it arrives at the recipient’s machine during normal business hours, regardlessordinarily, whether the recipient has read it or not. Given that the fax was received into memory on Wednesday, it might be considered communicated at that point. However, since acceptance was already effective from Tuesday, this communication likely does not alter the contractual position. The law generally does not allow unilateral revocation post-acceptance, rendering Buyer Ltd’s fax legally inconsequential in terms of cancelling the order.
Implications for Seller Ltd’s Decision
Seller Ltd’s decision to turn down Tertius Ltd’s offer at 3 pm on Wednesday, based on insufficient stock, introduces the issue of reliance and potential loss. Seller Ltd was unaware of Buyer Ltd’s acceptance at this point (as the letter was read only at 2 pm but the decision was made at 3 pm, suggesting possible miscommunication in timing within the scenario). If a contract exists with Buyer Ltd, Seller Ltd may argue they suffered loss by rejecting a higher offer (£11,000 versus £10,000). However, English law does not typically award damages for lost opportunities unless they arise directly from a breach of contract (Beale, 2012). Since Buyer Ltd’s acceptance appears binding, Seller Ltd’s loss may not be recoverable unless Buyer Ltd subsequently breaches the contract by refusing to proceed with the purchase.
Conclusion
In conclusion, this analysis suggests that a valid contract was likely formed between Seller Ltd and Buyer Ltd on Tuesday when the acceptance letter was posted, under the postal rule as established in *Adams v Lindsell*. Buyer Ltd’s subsequent attempt to countermand the order via fax on Wednesday is unlikely to be effective, as acceptance cannot typically be revoked once communicated. The timing of the fax’s receipt into memory does not alter this position, as the contract was already binding. Seller Ltd’s decision to reject Tertius Ltd’s offer may represent a loss, but it is not necessarily actionable unless a breach occurs. This case highlights the importance of clear communication and the potential pitfalls of the postal rule in modern commercial dealings, where electronic methods might create competing expectations of immediacy. Further reflection on the balance between legal certainty and practical reliance in contract law remains essential, particularly as communication technologies evolve. Ultimately, the outcome reinforces the need for parties to stipulate precise terms for acceptance and revocation to avoid such disputes.
References
- Beale, H. (2012) Chitty on Contracts. 31st edn. Sweet & Maxwell.
- Byrne, D. (2010) The Law of Contract. 8th edn. Oxford University Press.
- Treitel, G. (2015) The Law of Contract. 14th edn. Sweet & Maxwell.

