[ChemicalWarfare]

Not necessarily :) If the bank calls the cardholder on file and the cardholder tells them the tx is not his they will at least reverse the auth so the merchant can't issue a capture against it when shipping the actual goods. In some cases they call them before the auth is approved.

But again the banks are not in business of protecting the merchant. There are companies that are in that business however and as a merchant you have an option to use their services.