(a) Give a practical example of how an acceptance may be validly withdrawn.
(b) How can an acceptance be validly withdrawn in the context of electronic communications?
(a) If the offeree sends an acceptance by post, it may call the offeror before the acceptance arrives to withdraw its acceptance.
(b) If the offeree sends an email accepting, but then immediately sends another email withdrawing the acceptance, this should be effective under Article 22 CISG. Alternatively, the offeree could call the offeror in an attempt to ensure that the offeror is informed of the withdrawal before it reads the email concerning the acceptance.
