500
"There is a charge for $49.99 on my account from Yahoo that I never made. I would like a refund for the fraudulent charges."
You pull up the YID associated wtih the charge and go through Reverse Verification with the user. They verify the zip, billing address, and last 8 digits of the CC.
Would you consider this a fraudulent charge based on Reverse Verification?
Yes. The user was not able to pass the Reverse Verification process, and was therefore not officially tied to the account.