Does Elder Son Signature For Selling Land Required?

No issue if your father was dead then transfer your mother's name for his land and after mother can give power of attorney to his son so then you can also sell this land

Dear client, In this case if the property is an ancestral property then your signature is required to sell of the land. In any other case it is not

If land is on father's name then father can sell that property without your permission but after death of father your brother can't sell that property legally but illegally it can be saled .