In April 2018 Visa made a major overhaul to the taxonomy and organization of chargebacks, which they now refer to instead as disputes. This included consolidating and removing some old reason codes and creating an organizational structure where all dispute codes fall under one of four categories, numbered 10 through 13. The format for the reason codes is the dispute category followed by dispute number within that category. For example group 10 is the Fraud dispute category, and the dispute reason code 10.4 represents the dispute description Other Fraud: Card-absent Environment.