FFXIII Campaign Codes

[Anakhu]

how and where do I use this code?

I have 2 codes in my game case. 1 is a SE card that says recieve a special item for registering game and has a code. And then I have a posted note on that with another code that I labled FF 14 Beta, it has 5 sets of 4 numbers.. the original one on EA card is 4 sets of 4 numbers... which one do I use and where do I use it... or am I already still registered since I somehow have that code on a posted note.. this was a few years ago lol.. so, I cant remember