All you have to do to earn one is get a referral for CB that finishes the tutorial.
After you get the referral just CM me and I'll get the code to you after I check the logs.
This thread is closed to new posts.
However, you are welcome to reference it
from a new thread; link this with the html
<a href="/bboard/q-and-a-fetch-msg.tcl?msg_id=003FUh">(Pseudo) Free Codes for Double XP in MW3</a>