on your father demise apply for and obtain letters of adminstration for property in your mother name
2) consent affidavit can be executed by other legal heirs
3) if no objection is received mutation would be done in name of legal heirs
4) then apply for mutation of property
5) if property has been mutated in third party name apply to revenue authorities to remove that person name . rely upon original documents to prove that father had purchased property by regd sale deed . . emnclose father death certifcate and for mutation in mother name