Hello,

As long as the details such as your name and your father's name in your class 10 certificate are the same as you have mentioned you won't face any issues.If your father's name is Kumar Singh in your class 10 certificate and other documents too then its fine.If it is different in one or two documents then you need to provide an affidavit.

You haven't mentioned the document in question. Can you help us with that information please? Neverthless, if the surnames are different, your father needs to get an affidavit done stating that both these names belong to him. Any advocate can help him regarding this. With thos document in hand, there should not be any issue during document verifivation for job purposes.