When dealing with a broker, it’s best to do it in writing. That way, if there’s a problem, you have a paper trail that suggests how you wanted the trade to happen. If you suspect that you are the victim of securities or investment fraud, here are some places you can go to get more information:
U.S. Securities and Exchange Commission
National Association of Securities Dealers, Regulation
Investor Protection Trust
Alliance for Investor Education
North American Securities Administrators Association
Here you can find information about your state’s securities protection office.