1. The receipt is the most important step in the transaction of POS machines, and serves as a voucher for UnionPay to adjust the bill.

2. However, if there is no signature of the cardholder or consumer on the purchase order, the merchant will definitely compensate the money, so the merchant must check the signature on the purchase order so as not to cause losses to himself.

The second point: the merchant has the responsibility to keep the consumption receipt for at least 180 days.

1. According to regulations, the longest time to initiate bill transfer can be traced back to 180 days ago. If the cardholder initiates bill transfer, and the merchant can't show the receipt when UnionPay asks for it, then the transaction will be considered untrue and the money will definitely be returned by the bank.

2. Faced with this situation, many businesses said they didn't understand and didn't cooperate. Why should consumers adjust their orders? I think there is something wrong with the POS machine. In order to protect the rights and interests of consumers, according to the regulations, cardholders can initiate an application for bill adjustment.

The third point: you need to confirm the authenticity of the bank card when swiping the card.

1. It is very simple to confirm the authenticity of the card as long as the merchants get into the habit. When swiping a card, make sure that the printed number is consistent with the number on the card. Once you accidentally brush a fake card or a card with risky transactions, the loss must be borne by the merchant.

2. If you are told that a transaction is suspected to be a fake card, the merchant had better cooperate unconditionally, and don't try to delay or not cooperate, otherwise you will have to bear the consequences of machine shutdown!