Information on logging into the Battle.net application on more than one computer
How to link or unlink your Facebook account and Battle.net account, and login using Facebook,.
What to do if your ticket is stuck and you can't remove it
Recovering a Battle.net Account when the email address has been forgotten
Customer Support can assist in recovering Battle.net Accounts if provided with necessary information.
Information about retrieving a locked account
How to remove your Blizzard Authenticator