When making purchases with credit cards, cardholders often encounter such problems: What should they do if there is a dispute over the credit card bill? After receiving the signed bill, they often face questions about the credit card bill. At this time, the cardholder should call the bank's customer service hotline to inquire about the disputed account. During the inquiry of the disputed account, you may be worried about whether the disputed transaction will incur interest charges. It is best to read the original cardholder manual in detail. Usually, the transaction you question will be treated specially during the inquiry. There are interest charges. Once the transaction is found out, if it is indeed a wrong account caused by forgery of the credit card or negligence of the special merchant or bank, you will not be responsible for the transaction and the relevant funds will be returned to your card account. However, once it is determined to be your normal transaction, the bank will charge corresponding overdraft interest, late payment fees and other fees. When handling returns at a specially appointed merchant, the cardholder should provide the purchase order form and ID document used at the time of purchase. If the purchase form is printed by a card press, the cashier should print the same purchase form when returning the goods, with the amount in red. The cardholder will sign the purchase form after checking it is correct, and the merchant will transfer the return money to the credit card department. The credit card department will then deposit the returned money into the cardholder's account. If the purchase order is swiped through a POS machine, the return can be made directly through the POS when handling returns.