You do need to wait for the email, so the person who's picked the item has it back at Customer Service.
It normally takes a hour or two, but you do need to wait for the email, otherwise they give you blank looks or get irked at you for showing up early. :lol:
Bring the credit card you used to make the purchase as well as a photo ID. They can only put it on the card you used to make the purchase.
Also, if you have a Reward Zone card, you need to put it in on the order webpage, since they can't do it after the fact.