My credit card, bank account or PayPal has a charge from Blizzard that I don't recognize.
Friend or family member used payment information without permission and I would like a refund for the purchase(s) made
The Blizzard End User License Agreement explains what you may and may not do with a Blizzard account. This article highlights a few passages from the EULA that are most relevant to this policy.
What to do if you found a charge on your PayPal account that don't recognize
A temporary pre-authorization charge may be applied when making a digital purchase.
What to do if you found a charge on your credit card or bank account statement that don't recognize
Information about authorization holds on your bank statement
Information about authorization holds in your bank statement
Information about removing an authenticator you did not attach
Information about common payment issues and troubleshooting steps