Does a Signature Without Understanding Count as Genuine Consent?

A signature can show that an action occurred, but it cannot by itself prove that consent was valid. Imagine a patient signing a form before surgery while misunderstanding “possible permanent loss of hand movement” as “a few days of soreness”. If the clinician recognises that crucial misunderstanding and still treats the signature as sufficient authorisation, the patient has not genuinely decided what may be done to their body.

Contemporary accounts of informed consent do not reduce consent to a name on paper. They generally involve relevant information, comprehension, decision-making capacity and voluntariness. The 1979 Belmont Report identifies information, comprehension and voluntariness as elements of research consent, while philosophers continue to debate how much understanding is enough. Requiring complete professional knowledge would be unrealistic. The more serious and irreversible the risk, however, the stronger the reason to ensure understanding of the central consequences and alternatives.

My view is that a signature is verifiable evidence of consent, not a magic act that creates it. The person seeking permission must explain matters intelligibly and respond to evident misunderstandings; the person choosing also has a responsibility to engage and ask questions. Yet even after a good explanation, “no” remains “no”. Insufficient understanding may prevent a “yes” from authorising an intervention, but it does not automatically permit others to rewrite a refusal as consent.

https://plato.stanford.edu/entries/informed-consent/
https://www.hhs.gov/ohrp/regulations-and-policy/belmont-report/read-the-belmont-report/index.html