This discussion addresses a situation where a developer and landowner have a Joint Development Agreement (JDA) with a 60:40 sharing ratio, and the landowner later requests a lump sum payment for their share. It explores whether the JDA needs amendment, the validity of supplementary agreements, and the crucial aspect of stamp duty. The advice given is to amend the JDA, with stamp duty levied on the consideration or market value of the owner's share, whichever is higher. Registration of the JDA afresh is recommended, and stamp duty applies to the entire amount.