AIMS AND METHOD: Capacity legislation in the UK allows substitute decision-making for adults lacking capacity. Research has explored the experiences of such adults and their carers in relation to the Adults with Incapacity (Scotland) Act 2000, and the Mental Capacity Act 2005 in England and Wales. A systematic review of the relevant research was performed using a framework method. RESULTS: The legislation provided mechanisms for substitute decision-making which were seen as useful, but there were negative experiences.