Complain about a professional
A bewildering array of boards, commissions and agencies try to ensure that professionals of all stripes abide by the rules and standards that apply to them. These links will take you to the forms and sites where you can begin to take action against those who you believe have violated those standards. If you want to let us know as well, you can send it to email@example.com.
Real estate professionals (for Realtors, you can also complain here)
Architects, engineers, landscape architects, interior designers, land surveyors
Stockbrokers, investment advisers