indeed. my credit card requires me to preload money from my bank account. it's like there is a second account that keeps a balance that i can spend using the credit card. whenever i use it, the balance is updated. how the credit is paid off i don't know. it could be either right away, or the amount is just hidden by my bank until it is time to pay off at the end of the month. either way, the credit limit is zero. so i can never spend more than i put in first. (though this may be based on how much i spend or be a configurable value.)