Is the first time it happened to me. I bought 2 50$ PSN cards and when I try to activate them it says:
The code you entered may not be correct or may no longer be valid. Please check your entry.
This is the first time I see this... It's a lot of money and i want to know what to do!!
Kindly report this issue using the link below and our CD Key department will liaise with you to resolve the issue.