Credit card installment means that the cardholder can choose to pay the consumption amount by installment when using the credit card. When spending in installments, banks usually require cardholders to provide corresponding consumption vouchers, such as shopping receipts, invoices or other relevant supporting documents. This can ensure that the bank can audit the installment consumption and ensure the authenticity and legality of the consumption. At the same time, cardholders should also keep relevant consumption vouchers for future inquiries and rights protection.