"Automatic correction" means that the POS will automatically generate a transaction for the original transaction and send it to the host before the next transaction until the transaction is successful due to timeout or failure to receive a valid response packet. The transaction is POS, which can be started automatically without cashier.
Example: A merchant's electrical appliance store used its credit card to spend 500 yuan on May 30th. During the transaction, an error was reported and the purchase order was not printed. The cardholder said that he received a debit message from the bank. The merchant calls the customer service hotline in time, and the customer service tells the record to check with the bank and reply the next day. After bank reconciliation, the transaction is "successful" and the transaction will be returned to the cardholder's bank card.
Extended data:
reversing trade
That is, a transaction has been marked as successful at the terminal, but the account transaction package sent to the host has not received a response, that is, the terminal transaction timed out.
Therefore, it is uncertain whether the transaction has been successfully completed on the host. In order to ensure the interests of users, the terminal sends a request to the host again, requesting to cancel the transaction process. If the host successfully completes the transaction, the transaction is rolled back, otherwise it is not processed, and then the processing result is returned to the terminal. There are two results: "Correction succeeded" and "Correction failed":
1. "Reversal succeeded": the transaction funds have been reversed successfully, and the card needs to be swiped again.
2. "Reversal is unsuccessful": Due to the failure of the POS machine and UnionPay settlement center in data transmission, the account of the transaction initiator has been deducted, and the transaction initiator needs to swipe the card again.
References:
Baidu encyclopedia-credit card machine