In 1971 my father purchased a flat in co op ho so and within six month he died. The society transferred the flat from my father's name to my mother's name. When my father died I had two married sisters .Last 40 years the flat is in my mother's name . At present her name is on share certificate and all correspondence of co ho so. is in her name as member.
When my father died my two sister were already married.
Now mother is at 90 and she wants to transfer the the flat in my name. She has given me power of attorney and nomination is given in my name since I have looked after her for last 40 years.
Is it necessary to obtain NOC from my sisters for transferring the flat in my name. I will be gratful if any body guide in the matter