My father has purchased the property (land) on my grand fathers name 30 to 32 years ago and my father is only the son and he has 3 younger sisters. my grand father passed away 22 ago and after his death my father transferred all property to name of his mother (My grand mother) and my grand mother is alive still. Now my father first sister is claiming for this property share since now this property value is crores together and another 2 sisters are not interested on my fathers property as they knows its purchased by my father and he got it registered on his fathers name cause of respect on him. But my first aunt keeping this point, she is claiming for share. Now my questions are
1) Do my grand mother has any rights to transfer all the property to my Fathers name since currently all property is on her name (since even my grand mothers is not willing to give share to my aunts)
2) My grand father died suddenly on his 60 age cause of heart attack so it was unexpected he did not make any will or property transfer by his own, only my dad did it after my grand father's death. Now my dad has any ways to prove that property was purchased by himself with oral statement support from his mother and his another 2 sisters??
3) There is any ways (Legal points) to avoid the property sharing to my dad sister legally??
Please guide us to save our property, because this is my fathers own earned property. The mistake he has done is he got registered the property on my grand fathers name. Please mail me to "email@example.com" the solutions and guidelines for dealing with this case in better way.