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The only way I know is that if the hex editor that you used to make the card with DID NOT ask you to reformat your card after it had finished then you have a goldcard, but this is far from certain.

The main thing would be an RUU failing on the CID check, this would show it not to be working
Thanks Completely hatstand. I followed the guide to creat a goldcard, which didn't ask for reformatting. So I assume I have a goldcard.![]()