Land problem

Dear Sir,

             My grandfather (my father’s father) had two children -a daughter and a son. One is my father and the other is my aunt(my father’s sister). My aunt had got married around in 1955 itself and left us  and been living with her husband  till her death on 1996. My grandfather had died in July 1975 itself. He had left a property of land 4 acres. He had not written any document on my aunt’s name sothat her heirs to claim for the land property. After my grandfather’s death, my father only has been possessing and looking after the land till date by paying all necessary taxes concerned with the land on my father’s name. By mistake my aunt’s name was entered into A-register(UDR)  of the land around 1976 after my grandfather’s death and it has not been  deleted  from the register sofar. But PATTA has been given on my father’s name only wherever survey was made due to possession of it by my father.

                  My request is how to delete my aunt’s name from the A-register. Should I have to move through the court of law? Kindly advise me to solve the problem.

                                                                                                                 Rajendran.