Does the questioner want to ask, "Is it okay to use the income certificate issued by a temporary worker when applying for a credit card?" Can. According to the official website of the Bank of China, it is known that when applying for a credit card, it is acceptable to provide income certificates issued by temporary workers. When applying for a credit card, an individual has a fixed occupation and a stable source of income, and provides a guarantee to the bank. The form of guarantee includes personal guarantee and unit guarantee. and personal financial guarantees.