Lacarra shows that the in-app payment binding credit card is normal. At present, the timely repayment of credit cards has brought great convenience to users, but there are still great risks behind the convenience. Although Lacarra is a famous payment company, its risk control technology is definitely not as strong as that of banks, so it gives many criminals the opportunity to steal other people's credit cards. In order to reduce the problem that users' funds are embezzled by others, Lacarra company has specially increased the binding and authentication of credit cards, so that one person, one machine, one yard and one card are available only to users.