I am planning to purchase a property in Mumbai suburbs. The property was in the name of the mother who expired and subsequently is transferred in the name of the 2 sons by way of nomination. However the name of the father appears in the ration card. The father is missing since last 4 years and there is no death certificate. Pls advise if the death certificate can be obtained or any other legal document so he cannot make any claim whatsoever on the flat at any later date. Thanks