A controversy is brewing among members of the American Psychological Association (APA).  As reported in the Spring issue of Clinical Science, apparently the "Practice Assessment Fee" collected by the APA is voluntary - except that nobody knew:

Many psychologists were stunned recently when the American Psychological Association revealed that the "practice assessment" it has charged its licensed members for the past 10 years is not in fact required for membership in the organization.  Instead, the association said, the payment is voluntary "financial assistance" to the APA's political affiliate.

Count this psychologist (and APA member) as stunned as well.