Does revocation of offer have be communicated only by the offeror not by a third party?

Revocation of an offer may be communicated by either the offeror or a third party authorized by the offeror to do so. The key requirement is that the revocation must be communicated to the offeree in a manner that would reasonably lead them to understand that the offer has been withdrawn. If the offeror communicates the revocation directly to the offeree, or through a third party authorized to do so, the offer will be terminated and there can be no contract formed.