#1 - April 5, 2010, 3:26 p.m.
Did you lose the box altogether or are you simply unable to locate the key within the box?
If you're having difficulty locating the key within the box, I encourage you to review the following portion of the Authentication Key FAQ for more information:
Q u o t e:
Where is my authentication key located?
For the original 5-disc version of World of Warcraft, your Authentication Key should be located on the front of the manual if you have a Collector's Edition, or on the cardboard case for the CD sleeves if you have a Standard Edition. The authentication key for the 1-disc DVD-ROM version of World of Warcraft will be located on a label on the front of the cardboard case of the game's installation DVD.
For the Burning Crusade expansion set, your Authentication Key should be located on the front of your plastic CD case if you have a Collector's Edition, or on the front of the paper sleeve of the first CD if you have a 4-disc Standard Edition. The 1-disc DVD-ROM version of the Burning Crusade will be located on a label on the front of the cardboard case of the game's installation DVD.
If you have the World of Warcraft Battle Chest, there will be two Authentication Keys. The World of Warcraft Authentication Key will be located on a label on the front of the cardboard case of the game's installation DVD. Similarly, the Burning Crusade Authentication Key will be located on a label on the front of the cardboard DVD case for the expansion.
For the Wrath of the Lich King expansion set, your Authentication Key should be located on the front of your manual if you have a Collector's Edition, or on the front of the paper sleeve of the DVD if you have a Standard Edition.