Hey,
By analysing your case I would like you to know that a Section 463 of Indian Penal Code, 1860 provides that whoever makes any false document or false electronic record or part of a document or electronic record, with intent to cause damage or injury, to the public or to any person, or to support any claim or title, or to cause any person to part with property, or enter into any express or implied contract, or with intent to commit fraud, commits forgery.
You can refer to State of Orissa v. Rabindra Nath Sahu, 2002
In this case an individual aiming for a government job, of Junior Motor Vehicle Inspector which position had reservations for Scheduled Tribes in India. The individual allegedly fabricated his identity and submitted a caste certificate claiming to belong from a recognized Schedule Tribe group, which opened doors for him at securing the job position. Later it came out that the Individual forged his Identity documents, the High court of Orissa found the individual guilty of forgery and cheating the government.
As stated by you that your grandfather acquired land which was unlawfully transferred to your neighbour. In order to claim your potential ownership of that land, back you can follow certain remedies as mentioned below:
A) File civil lawsuit in the court which has jurisdiction over the property’s location seeking a declaration of you as the rightful owner and demand possession of the property.
B) File an injunction to refrain the accused from transferring the property to any other person.
C) Lodge a police complaint against the person who forged the documents and transferred the property in their name, under section 463 of Indian Penal Code, 1860.
Hope this helps you with your query
Regards,
Parth Chawla