How a friend can contact Customer Support when she/he can't log in.

What to do if you cannot access the Public Test Realms

How to reset your Diablo II (2000) password or change the email address registered to the account.

Troubleshooting steps when you can log into your account management page but not the Battle.net App

Information about why you may not be able to post in the forums, and steps for how to fix it.

Log in with Blizzard allows third-party sites and apps to extend the Blizzard experience and leverage Blizzard services.

Information on accessing Blizzard logs

Can't log into Battle.net website or get online when logging with the Battle.net desktop app.

Troubleshooting steps to help you connect to the Battle.net desktop app.

What to do if you continue being redirected to the login screen after entering your credentials