On the national level, the FTC (Federal Trade Commission) provides consumer protection by monitoring companies and looking for misleading advertising, aggressive sales tactics, and deceptions and scams. They have published a guide on avoiding security system scams specifically. Regulation on the state level depends on where you live. In California, for instance, The Bureau of Security and Investigative Services (part of the CA Department of Consumer Affairs) licenses and regulates businesses and professionals in security, including alarm companies. In Florida, meanwhile, the FDACS (Florida Department of Agriculture and Consumer Services) licenses and regulates the private security industry.