Ancestral property, partial sale without partition deed

Ancestral property, partial sale without partition deed - Joint Patta. There is an Issue in Patta name transfer: Mainly, This question is on the ancestral property. My grandfather was in possession of the property and has title records dating back to 1960. Since my grandfather expired in 1989 and then his two sons, my father, and my uncle (dad's younger brother). And this duo without entering into a partition agreement continued enjoying the same. Even today, the patta records are still available as Joint Patta in the name of the duo.In the year 2015, my uncle (father's younger brother) and his son sold the land that was in his possession thro verbal agreement without obtaining any signature from my father and his sons (we three were major at that time). Is this transaction valid as per law?As my father expired in the year 2020, and after getting the legal heir certificate. When we applied for the Patta transfer, it was not getting through. How to proceed in this matter as Patta is still in the joint name of my late father and my uncle and has no partition deed.If my uncle's transaction is legal, can we proceed based on the certified copy of the sale registration document of that transaction to claim that his part was sold and the remaining part is our father's and request for Patta name transfer?And my uncle (dad's younger brother) is still alive, this is FYI. By all means, Kindly provide your valuable suggestion on this one.Popular Questions: http://103.133.215.241/lawyerchennai/legal-consultation/immigration-lawyer-help/http://103.133.215.241/lawyerchennai/legal-consultation/landlord-delaying-to-return-the-lease-amount/