You can apply in Form –I affixing Court fee stamps of Rs.3.00 in his/her native Tahasil. The documents need for the same along with the application are Death certificate of the deceased person,Affidavit. Copy of Ration Card. Copy of Voter ID Card and Copy of R.O.R. (if any stands in the name of the deceased person). After that an enquiry about the same will conducted and based on the report of the Village Administrative Officer and Revenue Inspector and after due enquiry, this certificate will be issued by the Tahsildar mentioning the names of all legal heirs of the deceased.you can get a family survival membership certificate from the village officer for the time being.the person applying for legal heir must give an affidavit attested by notary.if need the format will send you.you can apply online in chennai