Quick Supercertificate question

Ok if you get a supercertificate do they mail you the gift card you want? Or can you get the code right there and use it right away? I am wondering how long I would have to wait if I got one.

there's a help section, but....

before you buy the card, you can choose wheather you want it mailed to you, or emailed (a code sent to your email address). On some you can only have them mailed to you or emailed, but on some other you have the option.