What to do if you receive an error that your code is already claimed in your account.

Explains the Real ID service, including limitations and how-tos.

Information on error "Your friend isn't eligible to receive this"

Troubleshooting for BLZBNTBNA00000A8E (2413)

How to purchase a gift for a friend who plays in another region.

Buying Battle.net Balance as a gift

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

How to report another player

How to manage your Battle.net profile visibility and chat settings

Information about Call of Duty points