Dispute on parental property

No your Brother has no right to sell the property without your signature. But, if your Father write a Will in favour of your Brother, matter is different. He can sell.

Sir, Thanks for reply, the will we make in the year 2014 the copy is not with us due to we are not staying at delhi, also we dont know wherether any further will make or not. Can we take true copy of earlier will from Sub Registrar office, we dont have any doucments ???

U issue legal notice thru advocate.wait what he replies..if he denies u file suit for partition in competent court. So if he has any will or gift is made in favour of he then he will produce it before court.and proves it.

Don't hesitate to goto court. If u.want justice go to court. I have seen enough people lost every thing who have tried to settle out of court. Some kanji pinji people will come who has no no concern will file Nama to u in Ur fore head.so search amicable advocate who tries promptly to give justice to his client

You have not provided full details.  Who has written the will and agreed to share in three equal proportions is not clear.  What sort of understanding was reached whether it was oral or in writing signed by all parties, if so why others have not retained their own copies. However, unless the property is divided in metes and bounds, no legal heir has the legal right to sell.

In case of apprehension, you can issue a legal notice to all other legal heirs  and request for providing your share of the property.  You can also issue such copy to Corporation, with a request not to affect any mutation in their records in any one of the legal heirs name alone, as there are other legal heirs.  Depending on the response of notice, you can file a partition suit in jurisdictional court.