Quote Originally Posted by AdrianMU View Post
He went through that one http://preorder.na.finalfantasyxiv.com and he registered it after the 20th
Well then. Upon successful registration, the key should have been shown in the web browser with further instructions.
And a copy of it sent by email. Which may have been put in spam folders or other places. Can't rule out ISP filters blocking it though.

Probably won't help anything, just stating what should and could have happened.