Dematerialize share certificates

My father has a few share certificates which he wants to convert to demat and for that i wanted to create a new demat for it, please do tell me the procedure and also some of the share certificates i have only the bonus certificates but not the main certificate will i still get the whole quantity which my dad has purchased with the bonuses ? ?

You can read this to know the process.

So i tried opening an account with zerodha, in the process just figured the adhar card name and the pan card name are different like not different as such just the names are jumbled, so im not able to proceed, and the shares certificates im holding some have the name match to the aadhar and some matching the PAN card, Im stuck big time