I've been working on a test/home study course for people interested to demonstrate their competency/knowledge in photograph identification-- auction workers. etc. The text and homework can be downloaded for free. There is only a fee to take the final test. Passing the homework and final test will demonstrate that one has a basic knowledge and understanding in the area. Those that pass can advertise (as they wish) that they've passed the course/test.
http://cycleback.com/course.html