Informed consent is a technical term first used by attorney, Paul G. Gebhard, in a medical malpractice United States court case in 1957. In tracing its history, some scholars have suggested tracing the history of checking for any of these practices:

Answer this question: where did the concept of informed consent first appear officially? Let's give stream of consciousness first:
This is the relevant information: Informed consent is a technical term first used by attorney, Paul G. Gebhard, in a medical malpractice United States court case in 1957.
So, the final answer is in a medical malpractice United States court case in 1957.