The Checkpoint-D is a robust, cost effective instrument for the examination of all types of documents where speed and efficiency are the first priority. It can be installed in a variety of locations where rapid and accurate verification is required. The small size allows easy fitting to Immigration and Customs Control Desks and it is unobtrusive in banking institutions where personal and financial documents need authenticating. The Checkpoint-D contains all the necessary light sources to check current document security safeguards and to highlight many modes of fraudulent alteration. Unique to the Checkpoint-D is an adjustable window that allows easy examination of retro reflective features and at the same time affords eye protection against UV lamps.