Hello,
It is immaterial whether you were aware or not about the fact that your father obtained the certificate fraudulently.
If you have got a job on the basis which does not actually exist then you may be thrown out from the job, you are not entitled to get benefit of such certificate.
The above advise has been rendered in light of the judgment passed by the Hon'ble SC which says that no benefit of reservation can be given on ground of fake certificates.
Also you may take a defense of estopple (section 115 evidence act) in the disciplinary proceedings, but in that case also the government has the liberty to terminate your services.
Regards s