What is an acceptance
An acceptance is a manifestation of assent to the terms of an offer made in a manner invited by the offer.
When is it effective
Upon dispatch.
Mailbox rule - Acceptance
Acceptance It is not valid if
4 the offeree-sender sends a termination letter before the acceptance letter ; OR
What is a rejection
An rejection is a manifestation of intent to not accept the offer in a manner invited by the offer.
When is rejection effective
When received by the offeror.
Note- if rejection is sent and then an acceptance is sent, whichever the recipient receives first is effective.