Housing and Urban Development, File a Complaint
Consumer information and how to file a complaint housing discrimination, bad landlords in federal housing, violations of manufactured housing, land sale frauds, deceptive home improvement contractors, and other abuses and waste.

Department of Transportation Auto Safety Hotline
FAQs, how to file a defect report, information on the recall process, and links to safety information.

Bureau of Consular Affairs, U.S. State Department
Helps with travel warnings, international adoption, passport and visa service and problems, Americans abroad.

Office of the Comptroller of the Currency Customer Assistance
The OCC charters, regulates and examines approximately 2,600 national banks and 66 federal branches and agencies of foreign banks in the United States. Site has instructions on how to file a formal complaint.

Environmental Violations
HOw to report environmental problems to the United States Environmental Protection Agency.

Commodities Futures Trading Commission
Public information and complaints page, with information about enforcement activities, consumer alerts, reparations program, and other links.

FTC Bureau of Consumer Protection
Bureau of Consumer Protection's mandate is to protect consumers against unfair, deceptive, or fraudulent practices. The Bureau enforces a variety of consumer protection laws enacted by Congress, as well as trade regulation rules issued by the Commission.

Medicare's Program Integrity
Health Care Financing Administration's page that explains what Medicare fraud is, how to recognize it, and how to report it.

SEC Complaint Center
Security and Exchange Commission discusses how to handle a complaint against a stock broker.

State Banking Authorities
Listing of officials that regulate and supervise state-chartered banks.