Yossi Vissoker is a forensic graphologist (handwriting expert) who has gained international recognition for his work. He has practised handwriting and drawing analysis for more than 35 years, in which time he has examined the writing of thousands of people, including the rich and famous. Yossi is certified by the American Board of Forensic Examiners as a forensic examiner, behaviour profiler and document examiner.

Pro Scripto document examination cc is a leading provider of forensic document examination services in South Africa since 1997. This service is supported by the presentation of expert evidence during judicial proceedings. Pro Scripto has invested extensively in technologically advanced equipment to provide a service of high standard. Independent and objective professional approach to questioned document related matters is one of the building blocks of pro Scripto. Independency and objectivity is supported by appropriately trained forensic document examiners will a collective experience of more than 70 years. Forensic document examination services include but is not limited to, individualization of handwriting and signatures, printed matter which include documents produced by computer printers, fax machines and photocopiers, stamped impressions, the identification of forgeries, erasures and additions on documents and the deciphering of obscured writing.

Forensic document examiners is known by many names including handwriting experts, questioned document examiners, document examiners, handwriting examiners, handwriting identification experts and sometimes handwriting analysis, although the latter name is not often used as it may be confused with graphology. Forensic Document Consultants specializes in the forensic examination of documents which includes laboratory examinations, interpretation of findings and presentation of conclusions reached for intelligence purposes or for use in court.