FBI Internet Fraud - tips to help you recognize scams so that you don't fall for them
Fraud.org< - National Consumer's League explains some common tactics used by fraudsters, including "scare tectics".
IC3 Internet Complaint Center - he Internet Crime Complaint Center (IC3) is a partnership between the Federal Bureau of Investigation (FBI) and the National White Collar Crime Center (NW3C). You can file a complaint with them if you are a victim of internet fraud or ID theft, or personally know a victim. The IC3 may be refer the complaint to appropriate federal, state, local or international law enforcement or regulatory agencies for possible investigation.