What is not true about valid consent -
Consent is voluntary permission or agreement. It should be in simple words. It should be taken in presence of two witnesses. It should be free and voluntary. ref : Dr. K. S. Narayan Reddys Synopsis of Forensic Medicine & Toxicology 27th edition pg. 26.
Obtained in presence of two witness
Use technical jargon
Should not be obtained with for force, fear or fraud
True information to be given freely
Medical Jurisprudence