In the process of bank audit, auditors usually don't attach too much importance to the matter of stamping. Because the seal is not convincing to some extent. If the bank has any objection to your income certificate, it will review it, and it will also call your unit directly to make relevant inquiries. So it doesn't matter what the seal itself is.
Remind that the company's phone number must be left, otherwise it may lead to the failure of loan review.