Found this over on the reddit Destiny page....
Destiny trading card codes!
It's currently a mystery as to what these codes will unlock for us. Some users are speculating that these codes will be used to unlock exclusive content in Destiny (such as Recon Armor), and others think that they will be used for a special flair on bungie.net. We will hopefully find out the secrets to these codes sometime in 2014.
Redeem them here...
http://www.bungie.net/en/User/coderedemption
Warlock: YKA-RJG-MH9
Hunter: 3DA-P4X-F6A
Titan: MVD-4N3-NKH
Rixis: TCN-HCD-TGY
Old-Russia: HDX-ALM-V4K
Hive: 473-MXR-3X9
Moon: JMR-LFN-4A3
Gjallorhorn: HC3-H44-DKC
Duke MK.44: 69P-KRM-JJA
The Tower: 69P-VCH-337
The Hive: Ogre 69R-CKD-X7L
Valley of the kings, Mars: 69R-DDD-FCP
The Fallen: 69R-F99-AXG
Red Death: 69R-VL7-J6A
The Cabal: 69X-DJN-74V
The Devastated Coast, Venus: 6A7-7NP-3X7
Vex Minotaur: 6A9-DTG-YGN
Emblem : 7F9-767-F74