In the last years biometry has shown a growing interest and it is used in a plenty of applications and devices. The term biometry derives from the Greek term “bios” (life) and “metros” (to measure) and it represents the science that studies the mathematical relations between human behaviors or human physical features. A specific branch of biometrics is represented by human signature recognition that allows to associate each person to his sign. The purpose of this paper is to present an automatic human signature system based on genetic algorithms (GAs).