a close relative of mine had bought by a virtue of a registered sale deed, a vaccant land in chennai in 1997 which is in his possession since then (with bonafide patta,chitta and adangal), now (in 2008, after 11 years) the seller at the same sub-registrar's office has registered a "deed of rectification" stating that as if an error has occured and has changed the extent of land in the schedule without buyers knowledge and consent and this came to light when he applied for EC, which shows an entry to that effect.
Can you please guide as to how will it be now possible to make this entry that is showing up in EC to be null and void? proceeding against the sub-registrar and other legal actions is one thing but how to make this entry null and void?? will IG registration help? or Whom to approach for relief as this seems to be illegal to register a deed of rectificaton without the consent of buyer? and that too altering/changing the total extent in the schedule it self?