How to attach an Authenticator to your Battle.net account

Information about removing an authenticator you did not attach

This is how to check if there is an error that the password is not correct

What to do if you cannot find the Battle.net Authenticator in your devices store.

Reasons your authentication may show an incorrect Geo-location when requesting approvals

Information on using the same Battle.net Authenticator on more than one Battle.net account

Information on unlocking the four extra backpack slots in World of Warcraft, and what happens when you remove your authentication features

What to do if the serial number at the back of the physical authenticator is scratched off

What to do if you can't resync your authenticator.

Information about this error message and what it means.