Credit card is a double-edged sword. It is really convenient to use it well. If you can repay it in full and on time, there will be no problem!
Credit cards are personal items. As long as his credit card is not handled with your ID card, there is no problem of property division, because it is not a house loan after all. Everyone has their own privacy, know, but don't say. Since he has a card, he must have his uses, so he should understand. But be careful not to overdue. Overdue users don't pay in installments in the bank. If the amount is small, they will still pay 10%. Generally, banks will not sue, but they will calculate bad records and interest late fees.