Hello, if his card has a limit, then there is no need to deposit money into it, but you must remember to repay it on time. If you don’t know when to repay it, you must do it within 20 days. If you deposit more than the transaction amount, it may affect his credit and cause bad records. You can use other people's credit cards, but be careful not to swipe the card at small merchants and remember to cover the keyboard with your hands. If you don't understand, you can ask me or initiate orientation. Ask for help, please accept if you are satisfied