Can the verification code of bank card be filled in randomly when online lending? Will there be a hint when you fill it in indiscriminately?

You can't. The bank card binding of the formal loan platform needs to use the bank SMS verification code to open the fast payment protocol. The card number is wrong or the information is wrong, so it can't be bound. The platform will prompt you. Because when the formal online lending platform binds the bank card, it is necessary to fill in the verification code of the reserved mobile banking. If the bank card number is filled in incorrectly, the verification code will not be received and the binding will not be completed. Therefore, once the bank card number is filled in incorrectly, there is no way for the formal loan platform to approve it.