The following sites are helpful resources for those wishing to learn more about identity theft and its prevention.
Internet Crime Complaint Center (IC3)
The mission of the IC3 is to address fraud committed over the Internet. For victims of Internet fraud, IC3 provides a convenient and easy-to-use reporting mechanism that alerts authorities of a suspected criminal or civil violation.
Federal Trade Commission (FTC), Identity Theft
At the FTC's site you can get more information on identity theft and learn how to file a complaint and notify creditors.