Exp bonus from a RAF invite

Cudenegro @ Kirin Tor
1 Draenei Shaman
Hi, I've been playing on this server for a couple of weeks and I recently discovered the option of inviting friends to get a exp boost.
But when I was going to send a invite to my friend e-mail, it said that it was already registered.
I get how it works, but is there any way to speak to a GM or some other thing to do to put this exp boost on my friend account when we play toghether or he needs to create another e-mail and we need to start all over again?

Plainfeather @ Kirin Tor

Write an ingame ticket and a GM will help you out. Cheers!

Cudenegro @ Kirin Tor
1 Draenei Shaman
Ok but where is the option? I looked for it but didn't found it

Galgnu @ Kirin Tor
1 Orc Shaman
Ingame - Red question mark in your options bar.

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