Under the mailbox rule, an acceptance sent via the postal system or by courier is effective when sent.

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The mailbox rule, also known as the "postal rule," states that an acceptance sent via the postal system or by courier is effective when sent. This means that the acceptance is legally binding once it has been mailed or sent, even if the offeror has not yet received it. This rule applies to both business contracts and personal transactions. However, there are some exceptions to the mailbox rule, such as if the offeror specifies a particular method of acceptance or if the acceptance is not properly addressed or stamped.

Under the Mailbox Rule, an Acceptance Sent Via the Postal