I have handled at least three such cases in my career spanning 35 years in corporates In al 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 response from all Universities ( Tow were from Madras University, one was from Delhi university} indicating these certificates were fake
3. Actually two were pre employment check and one was post employment check before confirmation
4. In pre employment situation, there was no problem as we have informed the concerned department that the person selected can not be issued with a letter
5. In the case of a probationer, we told him that his probation will be terminated. However, he resigned and we accepted and closed it
As a process, proper verification and examination must be done prior to taking a person on board or atleast complete verification before confirmation
If you get a proof that 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 threee or four years, of hius joining, it may not be correct Courts also may question the genuineness of your action
T Sivasankaran