Account has been hacked or compromised.
How to move a game account to a different Blizzard account
Changing language settings for game and/or communications from Blizzard
You can change your BattleTag in Account Management.
How to consolidate multiple Blizzard accounts into a single account.
Phishing scams can take many forms—fake websites, suspicious emails, and threatening in-game whispers are the most common types.
How to move a Hearthstone account off a Blizzard account
How to update the email for Parental Controls.
Playing Blizzard games on more than one platform.
If you forgot your Blizzard account email, you can use SMS Protect to find your account.