Reasonable man is the test for objectivity
Smith v Hughes
Cannot snatch a bargain
Hartog v Shields
Acceptance must be mirror image and unqualified
Hyde v Wrench
Acceptance must be made by the offeree
Boulton v Jones
The offeree must be aware of the offer when accepting it
R v Clarke
Motive is irrelevant as long as the offeree is aware of the offer
Williams v Cawardine
In offers of reward, the first performance is acceptance
Gibbons v Proctor
In offers of reward for information, the information reaching the target is valid acceptance
Gibbons v Proctor
Acceptance must be communicated (actively)
Felthouse v Bingley
Acceptance can be made by a third party authorised by the offeree
Powell v Lee
Acceptance may be implied through conduct
Intense Investments Ltd v Development Venture
Acceptance cannot be implied through passive conduct
Taylor v Allon
Prescribed mode can be a term of the contract
Manchester Diocesan Council for Education v Commercial and General Investments
Unless it is through the fault of the offeror, the burden is on the offeree to ensure acceptance has been communicated
Entores v Miles
When a letter is validly posted there is acceptance
Adams v Lindell
Valid post is either placing the letter in a Royal Mail postbox or giving the letter to an employee authorised to receive post
Re London & Northern Bank
Even if the letter is lost or destroyed it is acceptance from the moment it is posted
Household Fire and Carriage Accident Insurance Co v Grant
Postal rule does not apply if misaddressed or lost through the fault of the offeree
Getreide-Import Gesellschaft v Contimar
Postal rule is excluded when it is unreasonable to use the postal service
Henthorn v Fraser
Postal rule is excluded if it results in a manifest absurdity
Holwell Securities v Hughes
Postal rule may be ousted by clear communication in the offer that acceptance is only binding upon receipt
Holwell Securities v Hughes
Offer cannot be revoked once acceptance has been posted
Byrne v Tienhoven
Acceptance cannot be withdrawn once posted
Wenkheim v Arendt
Instantaneously communicated acceptance is valid upon receipt
Entores v Miles Far East Corporation