There are two most likely reasons why the POS machine displays an invalid card. One is that your account has been frozen, such as due to arrears, or you have reported a loss before, etc. Another situation is that your card has been demagnetized and the information cannot be read.

When card swiping prompts that the card is invalid, it is mostly due to the following reasons:

1. The POS machine line is busy or malfunctioning. In this case, it is recommended to try again later.

2. If the magnetic stripe of the credit card is worn and not degaussed, try a few more times and it will succeed. If it doesn't work, it is recommended to go to the counter or ATM machine to try to swipe the card. If it is confirmed that the magnetic strip is damaged, call customer service to apply for a card replacement.

3. The credit card is not activated.

4. The card or account status is abnormal, such as expired, reported lost, frozen, etc.

Solution

1. If all the magnetic strip cards cannot be correctly recognized on this machine, you can use a special cleaning tool to clean the three tracks. The credit card magnetic strips are worn. If it is not degaussed, try several times and it will succeed. If it still cannot be read, you need to replace the magnetic head. If it is a credit card, call the customer service of the credit card center. After checking the identity information, ask the customer service to help you check the status of your card. Ask How to defrost it. If it is an ordinary debit card, the kind that cannot be overdrawn, you need to bring your ID card and card to the counter to unfreeze it. As long as it is not frozen for judicial reasons, it can generally be unfrozen with your ID card.

2. If the entry card is damaged, you need to replace it with a new one; if it is a credit card, call the customer service hotline to explain that the card has been degaussed and please issue a new one; if it is a debit card, just Just bring your ID card to the bank counter for magnetization.

3. The credit card is not activated. Cardholders can activate their credit card through the customer service hotline on the back of the card and follow the voice prompts.

4. The transaction failed with POS machine error code 48. Please contact the card issuing bank. The card swiping operation may be incorrect. Re-swipe the card to ensure that the card swiping process and steps are correct.

Error code "00": The POS machine transaction was successfully accepted or the transaction was successful

Error code "01": The POS machine transaction failed, please contact the card issuer to check the card issuer or check the card Balance

Error code "02": POS machine transaction failed, please contact the card issuer to check the card issuer or check the balance in the card

Error code "03": The merchant has not registered and has no rights Use the UnionPay POS terminal to contact the bank card service center for processing

Error code "04": Confiscated card, please contact the acquiring bank operator to confiscate the card (this case is a high-risk card, there are black cards or imitation cards Suspected)

Error code “05”: Transaction failed, please contact the issuing bank. If the card is not accepted, please contact the issuing bank for enquiry.

Error code “06”: Transaction failed, please contact the issuing bank. Contact the issuing bank. The issuing bank has a problem. Please wait and re-swipe the card

Error code "07": Confiscated card. Please contact the acquiring bank to confiscate the card under special conditions. This situation is a high-risk card. There are black cards or imitation cards. Suspected card

Error code “09”: Transaction failed, please try again, redo the transaction, wait a moment and swipe the card again

Error code “12”: Transaction failed, please try again Transactions not supported by the card issuing bank. In this case, some bank cards do not recognize the card reader on the UnionPay POS machine or have not signed a payment settlement agreement with UnionPay.

Error code "13": The transaction amount exceeds the limit, please try again. The transaction amount is invalid. Use small-amount transactions or contact the card issuing bank. You can apply to the bank to temporarily increase your credit limit, or swipe the card for small amounts.

Error code "14": Invalid, please contact the card issuing bank. Invalid, contact the bank card service center or the card issuing bank. It is caused by long-term non-use or failure to pay the annual management fee, or the card may be cancelled.

Error code "15": This card cannot be accepted. Please contact the bank card service center for processing. It is not connected to the UnionPay network. UnionPay will not clear and settle the account.

Error code "19": Transaction failed, please contact the card issuing bank. There is an error in reading data when swiping the card. Please re-swipe the card.

Error code "20": Transaction failed. Please contact the card issuing bank. Contact the bank card service center or the card issuing bank

Error code “21”: The transaction failed, please contact the bank card service center or the card issuing bank

Error code “22”: There was an error in the operation. Please try again. The POS status is inconsistent with the center, sign in again, make sure the operator number and password are correct, and swipe the card again.

Error code "23": The transaction failed. Please contact the card issuer because the transaction fee is unacceptable. The transaction funds are at risk or the UnionPay agreement has not been signed.

Error code “25”: The transaction failed, please contact the card issuing bank. The card issuing bank could not find the relevant records. Please check the relevant information and redo the transaction or contact the card issuing bank

Error code” 30": Transaction failed, please try again to check whether the magnetic stripe of the card is intact or swipe the card in the opposite direction or there is no problem with the magnetic stripe of the UnionPay POS machine, and other interfaces are normal.

Error code "31": This card cannot be accepted. The card issuer has not opened business with the center. Check whether this card is a bank card that has signed a UnionPay agreement.

Error code “33”: Expired card, please contact the issuing bank for expired card or contact the issuing bank to temporarily freeze the settlement function

Error code “34”: Confiscated card, please Contact the acquiring bank for cards suspected of cheating, and the operator can confiscate them (black card imitation cards, high-risk cards)

Error code "35": Confiscate the card, please contact the acquiring bank for cards suspected of cheating, and operate The operator can confiscate (black card imitation card, high-risk card)

Error code "36": This card is incorrect, please change the card and try again. The operator can confiscate the card suspected of cheating (black card imitation card) card, high-risk card)

Error code "37": Confiscated card, please contact the acquiring bank. Cards suspected of cheating can be confiscated by the operator (black card imitation card, high-risk card)

Error code "38": The number of incorrect passwords has exceeded the limit. The number of incorrect passwords has exceeded the limit. Generally, in order to protect the interests of the cardholder by swiping the card at the POS machine, if you fail to enter it correctly three times in a row, the card issuer's system will automatically freeze the card. , automatically defrost after 24 hours.

Error code "39": Transaction failed, please contact the card issuing bank. The card swiping operation may be incorrect, please swipe the card again

Error code "40": Transaction failed, please contact the card issuing bank to issue the card. If the transaction type is not supported by the bank, check the balance in the card and the correct operation process, and re-swipe the card.

Error code "41": The card has been confiscated. Please contact the acquiring bank to report the lost card and the card issuing bank. This card has been reported lost and is generally a stolen card and a high-risk card.

Error code "42": Transaction failed, please contact the card issuer. The card issuer cannot find this account. This card is a black card...