How to tell if MObile Me has been used?

[prettibwoy]

If i have given someone a code how can i tell if has been used already? thanx

[BroadcastDoc]

As far as I know the only way to tell is to try and use it. If it doesn't work, it's used.

Nobody in their right mind is going to give someone a code to "check" because you could just go ahead and activate it. Then it's too late...