More often the forensic experts are submitted questions related not only to establish a signature executor writing executed unusual conditions, but also in determining whether the conditions have been executed signature or the text in question / stress, fear, feeling alcoholism , disease conditions, etc. ie factors that influenced the departure concrete mechanism of writing. Doing a review of forensic work in foreign countries, it appears that this problem is in forensic research attention in recent years. For now have foreign criminaliştii experimental data about the specific influence on the process of writing the unusual conditions related to natural or artificial deviation factors and the ability to diagnose based on symptoms identified conditions under which the signature was made (document) to proceed correctly identify executor of the criminal.