Currently, in the United States, there is no legal obligation for medical professionals or civil courts to uphold patients’ Advance Directives (ADs) regarding end-of-life care. The applicability and standing of ADs prepared by Alzheimer’s patients is a persistent issue in bioethics. Those who argue against giving ADs full status take two main approaches: (1) appealing to beneficence on behalf of the Alzheimer’s patient and (2) claiming that there is no longer any personal equivalence between the AD’s creator and the subject (...) of the AD. In this paper, I present profound arguments against both approaches. Firstly, I argue that the principle of beneficence cannot apply in the case of Alzheimer’s patients, and, secondly, that the moral and legal authority of the AD need not depend on strict equivalence of personal identity. I conclude by arguing that valid ADs protect the dignity and autonomy of Alzheimer’s patients and that, therefore, there are moral obligations to uphold ADs which should be reflected in public policy and legislation. (shrink)