Yes Nikhil, most times.
CIC know that in India, Pakistan, Srilanka, Bangladesh etc the registration of births were not properly done earlier days and there are also many irregularities related to family/surnames. As the Visa Offices are aware of these problems they consider any such issues sympathetically and probably accept the submitted documents. But they may ask to submit the original school certificates, later if they have some doubt or may ask for any further proof, if they need. However, make the solemn affidavit printed on the stamp paper and get it attested by a Magistrate instead of notary, which would be more better.

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