deed of rectification has to be executed by first seller to rectify mistake in sale deed
it should be duly stamped and registered
3) if first seller is not traceable
you may file a suit before a court under Section 26 of Specific Relief Act 1963. The law provides for relief to parties in case the real intention of the party is not properly reflected in the documents executed because of a bona fide mistake of fact.
. The court can direct the rectification of an instrument, if it is satisfied that the deed does not express the real intention of the parties. This relief is entirely discretionary.