I paid a builder to sell a flat to me and entered into agreement . Instead of giving me the flat to me, he sold it to MrA. On diputing, he made Mr A to agree to sell the flat to me. The builder made cheque payment to Mr A and I had to pay some extra. The Sale deed was registered and the builder signed as confirming party, Mr A signed as Seller, declaring that he had received the full settlement money. And I occupied the flat. Now after18 months, Mr A sends me and the buyer notice that the confirming party has not paid, though what I paid has been deceived and the flat belongs to him.. Am I not protected by Sale Deed? If the confirming party has not paid, am I responsible? Can he come with notice after 18 months of sale deed?