The offeree must be made aware of the revocation but that does not necessarily have to be by the offeror, it could be a third party
- Must be revoked before acceptance takes place so long as the offeree has not provided consideration.
It was held that notification by a third party of an offer's withdrawal is effective just like a withdrawal by the person who made an offer.
Byrne v Van Tiehoven (1880)
It was ruled that an offer is only revoked by direct communication with the offeree, + that the postal rule does not apply in revocation