The law against making a false claim of U.S. citizenship requires that the person claiming citizenship do so willfully. If one is delusional and allegedly cannot understand what he or she is doing and therefore cannot do so purposefully, is that a valid, affirmative defense – delusion? Obviously, such a defense could be invoked and it would then be up to a psychiatrist to opine if defendant was operating under a delusion at the time. To read how one appellate court ruled on this curious defense, click here.
http://www.greghillassociates.com/delusional-man-convicted-making-false-claim-of-citizenship.html.