a grate card code is P32979TXXP
You can purchase card packs with codes for The 39 Clues. Examples of codes are: G69CTWHC9T, G69CKR3K9T, 223M6DTNX2.
p27v7ao96w
22xf2mjpx2
P29w72kwxp
P2w62x67xp
P47wkjntxp
I have it. The card code is....... 776FKKFCF2
P29rp379xp
The card that can be used to unlock all 39 Clues Cards is to put in P63726DJXP
the 39 clues most rare card code is P32979TXXP
You have to buy packs of The 39 Clues cards to get the card codes. Card codes can only be entered into one person's card gallery, so you can not use a card code that someone else has already used.