Section 3(2)(vi) in Bihar Land Mutation Rules, 2012
(vi)Self-attested photocopy of document showing consent of all cosharers and the signatures of the co-sharers which shall be duly identified by members of Panchyat Samiti / Sarpanch / Mukhia / Ward member / Panch in rural areas or Ward Commissioner in urban areas in case of partition by mutual consent.