In Hyderabad thirty five years back in a layout father purchased two plots one was on daughters name, one was on son name.Later Layout Developers cheated plot owners, lay out land was sold as acres to big shots. Now land was possession by big shots. Plot owners settled in other cities and in abroad. Now father ready to file declaration of title suit in jurisdictional court, children settled in abroad. Can father fight in courts on behalf children directly, has locus standi? mother or father can file suit? or needed GPA from their child?