The Mental Capacity Act Singapore (MCA 2008) has a great influence upon an adult’s ability to make decisions, especially if their capacity to do so is affected. Having been in force for a decade, the overarching five statutory principles remain crucial. The amendment in 2016 refined four areas of the MCA. The MCA Code of Practice is a very important and helpful resource for anyone who falls under the various provisions in the MCA: the Mental Capacity Test, the Lasting Power of Attorney, the Court-Appointed Deputy, and the Office of the Public Guardian. Being aware of the safeguards for the person lacking mental capacity (hereafter referred to as “P”) so as to protect them from the LPA donees or court-appointed deputy’s potential abuse of power is essential in the care of P.