How to identify subjects like citizens, employees, suspects or migrants? Clemens Willemsen PhD promoted in 2019 at the Tilburg University in the Netherlands on the subject of ‘Identifying suspects and undocumented migrants by law enforcement agencies’. The introducing chapter of his dissertation is now available as the history of identification. The core of his dissertation forms the basis of the presented guide and framework which now can be used beyond the area of law enforcement. The guide includes a framework to determine the quality of the identification, in terms of product, process and organization.He also wrote a book on information security in 2021 in Dutch and has published the English version in September 2021.If you buy it you will be able to download an excel spreadsheet as a tool! see https://www.researchgate.net/profile/Clemens-Willemsen/publicationsIn 2021 he started to be the editor on a book about Four Decades of Information Technology and Innovation. This book has been published in October 2021. Contact him at https://www.linkedin.com/in/clemens-willemsen Read more about this authorRead less about this author