My wife was gifted a piece of land by my father-in-law in writing on a stamp paper of value rs50 and rs 10. The document is not registered. Me and my wife have invested money in the above mentioned piece of land by building a two storey building. Now my father in law is dead against giving that land to my wife. Can a case funder IPC 420 be filed against my father in law or can anyone suggest the IPC in such a case?