User's own reasons. The transaction password is entered incorrectly, the credit card is not activated, the magnetic stripe on the back of the credit card may be demagnetized or damaged, and the credit card limit is insufficient; Consumption exceeds your current available credit limit;
Card swiping machine problem. Card reader failure or busy communication line; The card reader does not have the same logo as the card.
The first payment has not been completed. The transaction mode of modern financial control limits the small secret-free payment, and the first transaction card can only be paid after the transaction, which leads to the unresponsiveness of credit card insertion; In this case, you can also consult the bank customer service to solve the problem.
F 1 error in POS machine.