I have handled at least three such cases in my career spanning 35 years in corporates. In all these cases, we followed the process mentioned below:
1. Write a letter to the college and university, attaching the certificate, requesting them to clarify whether the certificate is genuine.
2. We received responses from all universities (two were from Madras University, one was from Delhi University) indicating these certificates were fake.
3. Actually, two were pre-employment checks and one was a post-employment check before confirmation.
4. In a pre-employment situation, there was no problem as we informed the concerned department that the person selected cannot be issued with a letter.
5. In the case of a probationer, we told him that his probation would be terminated. However, he resigned, and we accepted and closed it.
As a process, proper verification and examination must be done before taking a person on board or at least complete verification before confirmation.
If you get proof that the document submitted was fake, summary dismissal is possible, and you can even lodge a criminal complaint against him.
There is no such law regarding limitation. But if you try to take an action of summary dismissal after, say, three or four years of his joining, it may not be correct. Courts may also question the genuineness of your action.
Regards,
T. Sivasankaran