In collaboration with Acre, which provides chargeback guarantee services, ecbeing has begun to provide standard options for the fraud detection / authentication system “ASUKA” to users who have introduced the EC site construction package “ecbeing”. “ASUKA” is a tool that can effectively eliminate fraudulent credit card users and take measures against chargeback in the EC site order lead. Since the identity of the detected fraudulent transaction is confirmed, it is possible to prevent fraudulent use of the credit card for many consumers without increasing the time and effort at the time of purchase. According to the “Status of Credit Card Unauthorized Use Damage” released by the Japan Credit Association, the damage caused by number theft of domestically issued cards increased to 22.3 billion yen in 2020, and is increasing year by year. Since fraudulent use occurs in rapid succession and tends to increase rapidly, it is an issue for EC operators to be able to implement fraudulent measures speedily and simply. “ASUKA” is supported by the fact that it has a mechanism to suppress false positives of genuine users, it is easy to introduce, and it is a fixed cost system instead of pay-as-you-go, and it has been adopted by EC businesses such as “ecbeing” users. It is said that it has started. In order to create an environment where EC operators can take countermeasures against fraud efficiently and effectively, ecbeing has realized the provision of standard options for “ASUKA”. In addition, “ecbeing” users will be able to use “ASUKA” in a minimum of two weeks.