One of my client wants to purchase land in Tamilnadu which were originally classified as anadeenam lands and was assigned to a land less poor in the year 1968. However the original assignee sold the land to the present vendor in the year 2005. The taluk authorities express their inability to trace out the assignment order to the original assignee. The original assinee is no more. The present land owner has mutated his name in the revenue records. Is it advisable to purchase the land from the present owner ?