Account has been hacked or compromised.
Information on the World of Warcraft Character Transfer service
Changing language settings for game and/or communications from Blizzard
How to move a game account to a different Blizzard account
Info article detailing how to turn off a network proxy.
How to consolidate multiple Blizzard accounts into a single account.
Information on the Name Change character service.
World of Warcraft accounts are assigned a name on creation, would like to change that name.
What happens when changing factions
Missing mounts, pets, achievements, heirlooms, toys or appearances missing after transferring one WoW character to another Blizzard account.