How To Do "recruit-a-friend"?? (help plz)

Hi, all

Currently i have bought world of warcraft and played for about a month, and i just ran out of subscription. But my friend just got the game, also were going to link our accounts by recruit-a-friend. So i sent him an invite like 2 days ago. Now were at this point where we have no idea what to do.

Because, now he has the game but he doesn't know where to put the authentication key. So basically my question is what to do, if my friend has the game, and we want to link our accounts? also where to put the auth key?

Thank you all.
All responses would be nice. ;D

 

If he has already installed the game and created an account, your already too far to link your accounts. Otherwise, have him download the 10-day trial that you sent to his e-mail, using that CD Key. Afterward, you can use his regular one, and you'll be linked for the full 90 days. You can also later, after he gets another 2 month subscription card, decide which account of yours to put the 'Zhevra' mount on (Zebra-Unicorn) which you can ride after level 60.