Skip to main content

Complaint Center

To report antitrust concerns to the Antitrust Division follow the steps below. Please keep in mind that the Antitrust Division is prohibited from giving legal advice to private individuals.

When contacting the Antitrust Division about a possible antitrust violation or potential anticompetitive activity, please provide as much of the following information as possible: 

  • The names of the companies, individuals, or organizations involved
  • How do you believe they have violated the federal antitrust laws? (For details on federal antitrust laws, see Antitrust Laws and You.)
  • Examples of, or details about, the conduct that you believe violates the antitrust laws
  • The product or service affected by the conduct, including where the product is manufactured or sold or where is the service is provided
  • The major competitors that sell the product or provide the service
  • Your role in the situation
  • Who is being affected and how they are being affected

You may submit your concern by e-mail, regular mail, or phone.

By email to

By postal mail to:
Complaint Center
Antitrust Division
950 Pennsylvania Ave., NW
Room 3337
Washington, DC 20530

By phone at 1-888-647-3258 (toll free in the U.S. and Canada) or 202-307-2040.

The Antitrust Division will create a record of the information that you provided, review your complaint, and refer it to the appropriate Division staff for further review. If the Division needs more information, we will contact you. Due to the confidential nature of Division investigations, you will not be notified if we open an investigation.  While we try to reply to every complaint, we cannot always respond to each message individually.

Our Confidentiality Policy and Privacy Policy apply to all complaints received by the Antitrust Division.

Individuals or companies who (a) believe they may have been involved in criminal antitrust violations and (b) cooperate with the Antitrust Division can avoid criminal conviction, fines, and prison sentences if they meet the conditions of the Division’s Leniency Program. More information about the Division’s Leniency Program is available on the Leniency Program page.

Updated May 8, 2024