I wonder if you guys that are getting that invalid problem, are trying to use a NA code for another regions PSN ID, or vice versa... Try checking that out, it could be the problem.
It does seem that way. There's a couple more people who have the same problem on the beta forums but no help. My PSN account is Canadian, I'm fairly sure I registered Canada for the beta. I have no way to tell for sure for which region is the code I received, it's not specified in the e-mail. I see references to EU as well as US in the urls My (wild) guess is that Canadians might have received US codes because, well both are NA. Except PSN makes a difference. Just a guess though.
Did anyone from Canada get a working PS3 code? Edited, Jun 14th 2013 12:11pm by PhoenixOmbre