It is true that signature verification is more mainstream abroad. Even if a domestic credit card with a password is spent abroad, you don't need to enter a password if you go through channels such as Visa and Master. I asked the employees of UnionPay and China Merchants Bank, why did this difference in habits occur? Did not get a convincing answer. The following is my personal speculation: In the late 195s, American financial institutions began to issue credit cards, which became a popular business model. However, the communication network technology of that era could not support the authentication by instant password interaction. Therefore, "signature verification" is the best choice after comprehensive weighing of security, efficiency and technology. China Bank Card Association (China UnionPay) was established in 22. The credit card industry in the Mainland started to make rapid progress in 23, which is called "the first year of credit card in China". That is to say, the large-scale development of credit cards in China is in the 21st century, when the real-time data interaction among banks, merchants and settlement systems has been fully realized technically. Obviously, at the same cost, "password confirmation" is safer and more reliable than "signature verification". Therefore, "password confirmation" has become the main mode of credit card issuers in China, and cultivated users' habits. From this, it can be seen that the method of "signature verification" in credit card consumption is a specific custom formed under specific historical conditions in Europe and the United States, and this method has no advantages. Just because the proportion of stolen money is below the bad debt rate that financial institutions can bear, foreign financial institutions have complied with this habit of customers and have not made mandatory changes. The "password verification" method adopted by the mainstream of domestic credit card consumption is more advanced in technology and should be popularized in a wider range. (As for the different liability brought by "password" and "signature", it is another question that can be discussed. Behind the credit card consumption verification method are the different technical paths brought by the late-comer advantage. Similarly, there are American families' habits of using recorded telephones, personal checks, and so on. Unfortunately, I have read many articles about the use of credit cards by financial experts and scholars, but I haven't seen anyone explain this layer. Instead, I have praised foreign practices indiscriminately, and everyone thinks that they represent the development direction of advanced productive forces ...