F&w.. yes , emailing the code is so much better for you no shipping and credits right away.. like they said , as soon as the person loads it on the acct. and sees its a valid code , they release credits.on a walmart card idk if they need the card or not when shopping , they dont online but shopping at store they might ? idk.. hope it helps..
Dont worry its really easy all you do is scratch off a little bar on the back of the card revealing the code and then send it in a message and your done. You also get your credits faster because the winner can just log onto amazon and redeem them right away :)