Which organization collects consumers complaints, stops unfair practices, and sues companies?

Federal trade commission is the organization collects consumers complaints, stops unfair practices, and sues companies

Explanation:

The Federal Trade Commission is a governmental USA agency that has as principal function the insurance of the security of the consumer, it works in the following of the U.S. antitrust law with the control and definite termination of activities from untrusty business, it is located in a building in Washington, D.C. but works all over the country.