This practical manual is aimed at employees of the police, judiciary, and other authorities who wish to describe the appearance of individuals or faces in detail or identify persons. It serves as a working guide for the intensive observation and documentation of the observed characteristics of a person or a face. Section A deals with the preparations and execution of a comparison of individuals based on photographs. All designations and variations of facial features are comprehensively presented, along with notes on their variability and potential changes. Current technical terms from police identification services are clearly listed in Section B, and their application is explained with the help of example drawings.