I still haven't been given my codes from the one in 400 promo from last month. You could win 2 avatar suits and a ghost prop and I was told I'd won and would get them around the start of last month. I've looked at all my junk folders and nothing has been sent but it seems to have been a common problem. I've seen several threads about it and was told by a friend to ask here as you sorted out their problem for them.
Just to clarify as this previously answered with a link for the specialization thread, this is nothing to do with the specialization trouble that everyone is having lately. Although I understand that most of the questions here about Halo 4 recently seem to be, so that's probably why I was given the link as it's default reflex.
Thank you for your time.