RT Journal Article SR Electronic T1 Valid consent to medical treatment JF Journal of Medical Ethics JO J Med Ethics FD BMJ Publishing Group Ltd and Institute of Medical Ethics SP medethics-2020-106287 DO 10.1136/medethics-2020-106287 A1 Emma Cave YR 2020 UL http://jme.bmj.com/content/early/2020/06/23/medethics-2020-106287.abstract AB When consent to medical treatment is described as ‘valid’, it might simply mean that it has a sound basis, or it could mean that it is legally valid. Where the two meanings are regularly interchanged, however, it can lead to aspects of the sound basis or the legal requirements being neglected. This article looks at how the term is used in a range of guidance on consent to treatment and argues for consistency.