If it is a criminal responsibility, because you used a fake unit certificate, it may constitute a crime of obstructing credit card management. Even if it constitutes this crime and your circumstances are minor, you may not be investigated for criminal responsibility. Therefore, if the responsibility is investigated, it will be handled in accordance with the crime of fraud in the Law on Public Security Administration Punishment, such as fines or detention.

However, personally, this case should be a major event, and it is more likely to be a minor event. But I suggest you don't do this again.