ABSTRACT
Over 40 years ago, Hilton (1969) described a subset of troubling signatures that examiners of questioned documents o¢en encounter. ese signatures are those produced during serious illness. e problem is amplišed if the illness occurs late in life, when handwriting changes from natural causes related to aging are already underway. Recognizing that variation is present in nearly every identišable element of a signature, Hilton stressed the importance of obtaining multiple samples to appreciate the variability and, more importantly, to identify a pattern of change falling outside this range of normal variability during periods of illness.
