It seems SE has moved a further step to region-block campaign codes.
If you have a campaign code from the first LE press of FFXIII, you can only use it if the code is from the same region as your SE account. At least thats whats happened to me.
I had both the NA and JP one but I thought I'd be nice and give 1 away cos I didn't have use for two of them. Gave away the NA one.
I got this message when trying to enter my JP first press FFXIII promo code to my NA (US) account.
its funny too considering they didn't even do this in FFXI.The code's region is inapplicable.
You can only enter codes from the same region as your Square Enix account.
This might mean that you can forget importing japanese goods that come with promo codes (eg like FFXI's piano collections bonus furnishing) if your region is not compatible as it might just not work.
..In any case, if anyone is stuck in the opposite situation as me, do let me know. I have a JP FFXIII first press campaign code (I believe it exchanges for Asuran Armlets or something). If you have the NA one and somehow want the JP one lemme knnow and we can do a swap...