If your purchase was returned in full, your pending Cash Back credit will be cancelled or your credited amount will be reversed :-).
If a portion of your purchase was returned, there is a good chance that the entire purchase will be cancelled. If this is the case, you will need to contact us and one of our agents will assist you will the remainder of the purchase. Another possibility is that your pending credit will be adjusted for the returned item, in which case there will be no need to write to us, yay!