#3 - Nov. 7, 2010, 9:46 p.m.
I wanted to come in and confirm the above post, Cco. As mentioned on the online upgrade page of the Blizzard Store: (
http://us.blizzard.com/store/details.xml?id=110000034).
There are a few minor restrictions (such as certain in-game chat privileges) in place when the digital version of World of Warcraft is purchased. These restrictions are to protect against fraud and will be removed once payment verification is fully complete. This may take up to 72 hours.
As soon as your financial institution releases the funds for your purchase the transaction will finalize and you should have all restrictions removed. As you may have come to notice by now, you should still be able to level past 20, as those restrictions have been removed. :0)