There are a bunch of services out there which try to help you estimate risk, e.g. http://www.volusion.com/ecommerce-credit-card-fraud-protection http://www.volu

There are a bunch of services out there which try to help you estimate risk, e.g. http://www.volusion.com/ecommerce-credit-card-fraud-protection http://www.volusion.com/ecommerce-credit-card-fraud-protecti... They're not perfect though, so you get some false-positives and they'll let through some e.g. Spammers sign up for web hosting in my experience.