The principle of informed consent stands as one of the most fundamental legal protections in Canadian healthcare and care settings, representing the right of every person to make decisions about what happens to their own body. This right flows from the common law recognition of bodily autonomy and has been codified across Canadian jurisdictions in various health care consent statutes, including the Health Care Consent Act, 1996 in Ontario, the Health Care (Consent) and Care Facility (Admission) Act in British Columbia, and equivalent legislation in other provinces and territories. In Quebec, the Civil Code of Quebec provides the statutory foundation for consent requirements, reflecting that province's distinct civil law tradition. The requirement to obtain informed consent before providing treatment is not merely an ethical aspiration but a legally enforceable obligation that, when breached, can give rise to civil liability for battery or negligence, professional discipline proceedings, and in some circumstances, criminal consequences. Yet Canadian law has always recognized that rigid adherence to consent requirements in every conceivable situation would itself cause harm, and nowhere is this tension more apparent than in emergency circumstances where obtaining consent may be impossible, impractical, or where delay could result in serious harm or death. Understanding when the emergency exception to consent applies, how it operates across different care settings, and what obligations remain even when consent cannot be obtained is essential knowledge for any professional working in controlled care environments across Canada.