General banks must require personal income proof when handling personal credit cards! This is one of the routine procedures for banks to handle cards, and has nothing to do with all the business activities of the issuing company! It's just that the credit card headquarters will contact the company phone number you provided to confirm whether you are a company employee. Therefore, the local local tax bureau will not know the income certificate issued by your company, and even if it does, it will not check it, because the income certificate does not represent the actual payment voucher!