Refer a friend. Where is he supposed to put his code?

I used the refer a friend thing and he cant find out where to put the code on mogstation.

You have to enter it through the Mog Station. I just went through this with my brother.

Its not at the main menu like you would expect. When your friend goes to setup a subscription, under Add/Change Subscriptions there will be a section to enter the code.

My understanding is that you cannot enter the code until you have an active subscription.

I hope that helps!