Dhana nischayam literally means commitment of wealth by one person to another by way of a Gift. in the present case has given his share in property to you by means of gift .
Aadharam It is a document written by an authorized licensee in a stamp paper as per the value of land and registered in registrar office about the transaction made to a property. It can be a will, or a transaction. It includes the area, boundaries and sketch about a particular piece of land.
please contact a local lawyer in this regard