"Dr, Chuck Spezzano, Klinischer Psychologe, Visionär & Bestsellerautor (USA), in Erfurt September Tour 2011."
Like so many other Spezzano promotional works, especially in Germany and Switzerland, this is a big lie.
Chuck Spezzano is certainly no clinical psychologist. In fact, he's not a psychologist at all by any international definition since he managed to get a Ph.D. that is not recognized by the American Psychological Association-- hence no quality control or following professional standards. His degree in "Professional Psychology" is unaccredited and he is unlicensed.
The "Best seller author" is another description we frequently see. I'd like to know how that is defined and who came up with that. In my thinking you are a best seller if you make the New York Times list or appear on Oprah and so far as I know that degree of fame has eluded Spezzano.
http://einfach-ja.de/ausgaben/1108/zeitschrift_einfachJA_augsep11.pdf
[Update Aug. 17, 2020: Dead link]