In a recent issue of Cognitive Neurodynamics Farwell (Cogn Neurodyn 6:115–154, 2012) published a comprehensive tutorial review of the use of Event Related Brain Potentials (ERP) in the detection of concealed information. Farwell’s review covered much of his own work employing his “brain fingerprinting” technology. All his work showed a 100 % accuracy rate in detecting concealed information. We argue in this comment that Farwell (Cogn Neurodyn 6:115–154, 2012) is misleading and misrepresents the scientific status of brain fingerprinting technology.