https://www.sciencedaily.com/releases/2019/08/190801104038.htm

Face morphing is a method used by fraudsters in which two separate identity photographs are digitally merged to create a single image that sufficiently resembles both people. This image is then submitted as part of the application for a genuine passport or driving licence, and if accepted, potentially allows both people to use the same genuine identification document without arousing suspicion.

A new study by psychologists at the University of Lincoln asked participants in one experiment to decide whether an image showed the person standing in front of them. In this task, participants accepted the digitally created morphs around half of the time, while a basic computer model could correctly identify morphs over two thirds of time.