A critical evaluation of two methods of signature analysis

The assessment of signature disguise, where an individual attempts to disguise their own signature on a document with the intent of later disclaiming it (so-called 'view to deny' signatures), is a problem faced by many document examiners. This study evaluates a method known as the angle value test and another experimental method involving angle measurements to determine if either of them can reliably establish whether a questioned signature is disguised or has been written by another person. By using 29 sets of normal and disguised signatures, both methods of analysis were shown to be unreliable techniques for identifying the author of a particular signature.