Unilateral contracts

Can the offeror revoke the offer after the offeree has started performance? (cases)

Offord v Davies Errington v Errington Daulia v Four Millbank Nominees

What case is the exception for the rule that the offeree must know about the offer?

Gibbons v Proctor

Carlill v Carbolic Smoke Ball Co. 1893

Mrs Carlill was entitled to a reward advertised on a poster as it was a unilateral contract, it is possible for a contract to be made to the whole world.

Does the offeree motive for doing the condition matter? (cases)

No Williams v Cardawine

Must acceptance be communicated in a unilateral contract?

No the rule that acceptance must be communicated is waived.

Does the offeree have to know of the offer before he satisfies the condition? (cases)

Yes Fitch v Snedakar R v Clarke

Definition of unilateral contract

A contract that is made in the form of a promise in return for a condition to be performed by the offeree.

Unilateral contracts cases

Carlill v Carbolic Smoke Ball Co. UDT v Eagle Airline Services