New World of Warcraft scam making the rounds, apparently. Tseric:

It has come to our attention that several customers have received correspondence from people claiming to be affiliated with Blizzard. This has come under the guise of a rebate form. These emails appear to be an attempt to acquire account information from players.

If you receive any correspondence from Blizzard, you may contact any one of our support departments to verify the nature of any email which claims to be from us.

The most common way for an unauthorized person to acquire account access is by learning account names and passwords. Be advised that Blizzard employees will NEVER REQUEST YOUR PASSWORD when verifying your account status. The best step in security for your account is to keep your password secret.

Best response, #17 by Coringar of the Sargeras realm:

Do I still get the rebate?