When does acceptance of an irrevocable offer occur?

Acceptance of an irrevocable offer occurs when the offer is signed and received by the party to whom it is directed. This is critical because for an irrevocable offer, once it is made, the offeror cannot withdraw it before the acceptance period ends. The moment the offeree signs the offer and it is communicated to the offeror, a binding agreement is created.

In the context of contract law, acceptance must be clearly communicated, and it must indicate the offeree's intention to accept the terms of the offer unequivocally. Simply posting the acceptance, verbally agreeing, or waiting until the end of the offer period does not constitute acceptance that would bind both parties under an irrevocable offer. Thus, signing and receiving the offer is the decisive action that solidifies the agreement and demonstrates that both parties are on the same page regarding the terms.