A: pos machine receipts are recommended to be kept by merchants for at least half a year. Because the time limit for bank bill adjustment is 180 days after the transaction date, if the receipt is lost within the validity period of bill adjustment, the bank initiates bill adjustment, and the merchant cannot provide the credit card holder's consumption credentials, and may have to pay in full.

Merchants renting pos machines should pay attention to confirming the retention time of receipts with POS service providers when signing agreements. Because when returning the plane, it needs to be returned to the POS service provider together with the receipt. There is definitely no problem with short-term leasing. The problem is that merchants who rent POS machines for a long time, individual POS service providers do not inform merchants of the retention period of small tickets. A few years later, the merchant returned the plane and asked the merchant for a small ticket, and none of them were returned. However, the shelf life of general thermal paper cannot be long. Therefore, when renting POS machines, merchants should ask clearly in advance in order to protect their own vital interests.