In your daily work you deal with customers that can be from different cities and countries thousands of miles away. External payment gateways ensure certain level of security, however, it is often required to ensure not only the credit card validity, but other data provided by a customer, such as telephone number (whether it is blacklisted or not), country, country and phone number correspondence, and so on. For these purposes there is special mechanism implemented in Billing called the fraud screening system.
Billing fraud screening system represents several auxiliary modules called fraud screening plugins. Each plugin serves for particular task. For example, the "Black List of Email Addresses" plugin checks whether a cardholder email is blacklisted or not. The set of plugins is mounted rigidly, some of them require configuration, and others do not. Immediate check of any order appearing in the system is based on special fraud screening filters. These filters may be considered as anti-fraud checking rules and represent a fraud screening plugin or a number of them combined into a logical chain for their usage.
Note: for clean Billing installation, a set of pre-configured and active anti-fraud plugins is provided. For these plugins, a set of default fraud screening rules is configured and the default rules are composed into default fraud screening filters. You can use the default configuration of fraud screening or adjust if needed.