Unable to place an order with error "Your credit card information is not valid"
How to resolve the error "The phone number is invalid" or "Please enter a post-paid number" when adding a phone number to your Battle.net account
How to contact the Blizzard legal department.
Regional or local taxes may apply to your digital purchases
Some free games require that you add a phone number to your Battle.net account
What to do if you don't receive texts from Blizzard
A phone number can only be linked to one free game
PayU General Information
How to remove a billing profile
How residents of California can opt out from giving Blizzard permission to sell their personal data.