My credit card, bank account or PayPal has a charge from Blizzard that I don't recognize.
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.
Information on the Blizzard Authenticator
Information about common payment issues and troubleshooting steps
Friend or family member used payment information without permission and I would like a refund for the purchase(s) made
Information on Blizzard Phone Notifications
A temporary pre-authorization charge may be applied when making a digital purchase.
Information about authorization holds in your bank statement
Information about authorization holds on your bank statement
Received a PayPal email notification for a Blizzard purchase made by someone else