Ancestor property

Hi this is joshila hailing from mangalore. i have a query regarding a property compensation money.My mother and she has five siblings two are not alive.Recently my grandmothers land is acquired by development department(KIADB) for power project.my mothers name was not left out in the will of the land but the my mothers brothers and mothers did a out of court settlement and the grandmothers property divided equally among each other as grandmother is no more.The land is gone for KIADB and their giving the compensation to my mother and her brother equally in their respective accounts...so far i hope the story is clear .everything was smooth and good, my mothers compensation was about to get. Now the climax is my brother(my mothers son) gave a objection letter to KIADB saying he is got a equal rights in the compensation as the land is ancestor property. But my mother is still very much alive.Now the kiadb is holding the compensation based onmy brothers letter which is not from the court.its just wriiten in piece of paper with his signature. Now do my brother has right. we are nine children. Eight children has no objection for mothers property their not claiming anything.only one brother is creating a problem,...please give me best advise.thank you and awaiting for your reply