It is reasonable to say that there is no problem, but if you are talking about repeatedly swiping a card on a transaction, it is likely to be deducted repeatedly. If the purchase order is not printed during the transaction, you should select the "Reprint" function.

If you still can't print the voucher after reprinting, you should select the function of querying the current transaction, query the batch number and merchant serial number of the transaction, then turn off the power and check whether the printer is connected correctly.

After reinsertion, select print specific record processing. If you still can't print, check the balance on the POS machine, and then check with the UnionPay customer service center whether the transaction has been reversed. If the reply is really successful, you can copy the consumption elements on the POS consumption list, and the cardholder can take away the goods with his signature or cancel the transaction. If you swipe your card again at will to redo the transaction, you may be repeatedly deducted.