Pos code skipping means that the payment company changes the merchant type in the background, changing the A-type merchant (0.6%) to the B-type merchant (0.38%) or even the C-type merchant (0 rate), and then submitting it to the UnionPay system.
The cardholder's fees are charged according to Class A (standard merchants), and the payment institution and UnionPay settlement are calculated according to the rate maliciously modified by Class B or Class C merchants. The profit gap is the "gray income" brought by the company's code skipping.
How to avoid card quilt code and code jump;
First of all, cardholders should pay attention to every transaction. After the transaction is completed, carefully check the transaction documents and then sign for confirmation. If it is confirmed that there is a code jump after the credit card transaction is completed, the cardholder can call the bank customer service phone as soon as possible to reflect the situation. Every bank has a different way of handling it. The cardholder should argue that the credit card can be adjusted if necessary.
If the above requirements are unsuccessful, you can ask the bank to manually add credit card points corresponding to the transaction in an attempt to recover the loss of code skipping.