When does the communication of acceptance become complete?

The communication of acceptance becomes complete when the offeror is made aware of it. This principle is rooted in the traditional contract law concept that acceptance must be communicated to the offeror to form a binding agreement. The offeror ultimately needs to know that the offeree has accepted the offer for a contract to exist.

If the communication of acceptance were considered complete at the moment the offeree sends the letter, it could lead to uncertainty and misunderstanding. For instance, if a letter is lost in the mail or never reaches the offeror, the offeror would not be aware that acceptance took place, and therefore, the contract would not be valid. The timing of communication is important for establishing mutual consent, which is fundamental in contract formation.

The other options do not align with this principle. The revocation of an offer does not relate directly to the completion of acceptance since an offer can only be revoked before acceptance is communicated to the offeror. Furthermore, acceptance does not hinge on an "appointing authority"; the essential element is the knowledge of the offeror regarding the acceptance.