A buyer purchased a portion of land based on a benama (sale agreement), but the seller's sister's name was never updated in the official khatoni records. Years later, after the sister and her father passed away, her husband sold the land to the current buyer. Now, the seller's sons are contesting the sale, claiming it was due to the brother-in-law's alleged bad habits. The buyer, possessing both benama documents and having paid in full, needs to know how to update their name in the khatoni and defend their ownership in court.