Credit card deposits cannot be used to pay for the purchase of materials. It is illegal to use credit card deposits to pay for the purchase of materials. Credit card deposit refers to the money that an enterprise deposits into a bank credit card account in order to obtain a credit card. Refers to the money that an enterprise deposits into a bank credit card account in order to obtain a credit card. Credit cards can deposit cash, but standard credit card deposits have no interest, and there is a handling fee for withdrawing the deposited money (this situation is called overpayment).