How to access the Parental Control settings on an account
Some games require that you add a phone number to your Battle.net account
Can't Log into Diablo Immortal with my Facebook Account
Information about retrieving a locked account.
What to do if you have lost access to your Blizzard Data File.
How to report a player for cheating in StarCraft and StarCraft: Remastered
Customer Support can assist in recovering Battle.net Accounts if provided with necessary information.