A Christian individual from Kerala, holding a registered Will from their father naming them as the beneficiary of a Mumbai flat, is seeking advice on regularisation for redevelopment. The property dates back to 1974, with ownership transferred to the beneficiary in 2018. The society requires legal documentation, including regularisation and stamp duty payment, to proceed with redevelopment. Suggestions include obtaining the original sale deed, applying for regularisation via stamp duty, and exploring deemed conveyance options.