Transfer of fathers property

I have not heard of a word called Nominee for an Apartment, however, if your mother is a joint owner of the apartment and your sister happens to be a co sharer as a legal heir of your deceased father, if both of them want to transfer the property on your name, two deeds are to be made, one being a gift deed by your mother in your favor in respect of her half share in the property (only if she is a joint owner) and the second one a a release deed by both, your mother and sister relinquishing their respective rights over their shares begotten out of the legitimate rights as legal heirs of your deceased father, in your favor and both of  these deeds are to be registered based on which you acquire title over the property in question.  You have to enquire about the stamp duty from the register office sources locally. Advocate Kalaiselvan, ph: +919443441062