Adding MY Mothers and siblings name in family property card

Hi My father expired 12 years ago we had purchased property from 2 person one was a bacheloer the other was married but not having children now the man who was maried expired so the land was purchased fro the bachelor and the married person (deceased) wife. The registration was done and the registration record card my fathers name is shown We approached the mucipal office to put the naame of my mother and her siblings on this property card as my father has expired. The muncipal office says that since property card was on the name of bachelor and the married person you purchased from his wife now they want us to bring the names of all the people who could be their heirs put their names first then we could get our names ther transfered. The property was purchase 32 years back and registered at that time we have a house built on it where we have been staying for 32 years. The muncipal officer is asking us to get the certificate from court that there are no other heirs of the married person except his wife