alt Hacker NewsI've always had fraudulent debit charges automatically reverted. Typically the bank's fraud detection disables the card and you clear up the matter on the phone. Or they call you to verify if a suspicious charge outside your profile was actually yours. The banks aren't required to do this but they can choose to provide this level of service.
the cc fraud (and fraud protection) is THE main selling point of Visa/MC credit cards.
it is that different treatment of debit/cc fraud that pushes people towards high fee cc.
it is cc fraud protection that justifies high cc processing fees.
without cc fraud there is no need in visa/mc duopoly.