My grandmother expired leaving a will,wherein my mother became the owner of a property and got her name in the share certificate of the property. my grandmother has one son(my father), & two daughters(my fathers sister).Two daughters & my father wants to relinquish all the property rights . They want to give this all property to my mother. I want to know whether this arrangement involves payment of Stamp Duty exceeding Rs.500 as per the Bombay Stamp Act? if not then what is the other way to save stamp duty and get my mother a lawful owner. The property is in Mumbai, Maharashtra