There is 3000 sq feet land in Lucknow registered by my father's name. My father signed a general POA to a person X in 1998. In the same year Mr. X sold half of the land i.e. 1500 sq feet and also Mr. X signed an AGREEMENT TO SALE the rest land 1500 sq feet to a person Mr. Y. When we got to know we firstly cancel the POA. Now Mr Y is claiming on whole land. but we are refusing to give the whole. We are accepting that 1500 sq feet is registered to his name, So we are bound to give it, but can we get the left 1500 sq feet, which was only an agreement not any registered agreement?