If you can’t use the form, please email firstname.lastname@example.org providing the following information:
- your contact details
- the business you have concerns about and a description of the issue along with any supporting evidence
- the market area according to the UK Standard Classification Index
- details of any other organisations you have contacted
Before completing the form, please read our guidance on what sort of competition or market issues to tell the CMA about.
Guidance on how the CMA handles information and complaints we receive about businesses is also available. We’ll acknowledge receipt of completed forms or emails, but we can’t enter into correspondence about your report or provide individual help or advice. Instead, you should contact Citizens Advice.
Unless you indicate otherwise, we’ll assume that information you provide is intended to be used by us and is to be shared or disclosed only so far as is necessary and in line with legal requirements. All information is handled in accordance with the Data Protection Act 1998 and other legislation designed to protect individual privacy and commercial confidentiality.
Report a cartel
A cartel is an agreement between businesses about not competing with each other - for example, by price-fixing, bid-rigging, output quotas or restrictions, or market-sharing arrangements. Cartels are usually secret. Read the guide ‘Cartels and the Competition Act 1998’ for more information.
If you have information about cartel activity, contact us using the details below. You may get a financial reward for information that leads to an investigation or may be treated with leniency if you report a cartel you’ve been involved with.
Cartels hotline: 0800 085 1664 or 020 3738 6888