Log in with Blizzard allows third-party sites and apps to extend the Blizzard experience and leverage Blizzard Services.
What to do if the account of a friend or family member was compromised.
Information on troubleshooting connection and installation issues using another network.
Troubleshooting claiming a Call of Duty: Vanguard key
An authenticator is on the Battle.net account that you did not add.
Recovering a Battle.net Account when the email address has been forgotten