Confirm fraudulent registration done by impersonated person through real owner

I am a Hindu.I along with 10 buyers purchased a plot from a newly laid layout in Mayuram in Tamilnadu. This layout has been sold by a person(let us call the power holder as X) who got registered power of attorney from Owner of the property(let us call the original owner as M). This property was promoted by a company so called Y. After an year of purchase, a person’s wife(Let us call her N) sent a petition saying that her husband is the original owner (M) and someone had impersonated his husband’s identity had executed POA for X and the registrations done on this land are fraudulent registrations.FIR filed and culprits got arrested. Since the original owner (M) is not in the position to appear in front of court or register office, his wife (Y) is ready to confirm my registration by getting just 20% of the current guideline value of the land as I am supporting them to get justice through my sources. Could you please advise me the right suit type to confirm my registrations (fraudulent registration done by the fake persons) through the actual land owner’s (M) wife (N) ?