1. According to international practice, customers need to sign the consumption list after swiping the card to confirm that the merchant will keep the customer consumption list for future inquiries by customers or banks.

2. After consumption, the merchant will print a coupon to the customer. If the customer finds the product quality problem and wants to return it, he can return it to the merchant with the receipt and credit card. It usually takes one to two weeks to receive a refund.

3. If there is no other justifiable reason, you may not refuse to pay after swiping the card.