Every code can be used only one time, so you need to send a different code to every person

So how do we know if one has been used or not? Are those codes different for each person?

Eh, you have to keep track of where you send your invitations.

Codes are always different. I don't get that question.

Eh, I wasn't very clear, sorry :P

If you don’t want to send the automatic mail... This will take you to a wiki with several codes. Just send one of these codes to the person you are inviting.

So if you go to that page, whould you see the same codes that I would see if I visited that page?

I would assume so otherwise when the "invited" used the link, MM wouldn't know who to give the invite tally to...

Gah! That is just plain wrong. It will not take you to a wiki, but to a page.

All the pages have different codes.

I knew it wasn't a wiki :) I just quoted part of the Invitations Guide... which I see you now fixed =)

Ok, that's what I wanted to know :) Thanks!