Age verification, Birth Certificate?

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Registered Users (C)
I used to provide 10th class certificate for all my age verifications. For I485 also, I used that. My attorney didn't say anything about it, and just applied.

Now while I was talking to my friend, he was telling that we should explicitly get the birth certificate from local authorities and provide it for 485. Is it true? If so what should I do? Can I just provide them now after obtaining from local authorities?

Sub labor, I140, AP, EAD got approved. FP done, no change in LUD after FP. 485 pending.

Thanks,
 
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