Report a problem to the CMA

We use some essential cookies to make this website work. We’d like to set additional cookies to understand how you use GOV.UK, remember your settings and improve government services. We also use cookies set by other sites to help us deliver content from their services. You have accepted additional cookies. You can change your cookie settings at any time. You have rejected additional cookies. You can change your cookie settings at any time. Tell the CMA about competition and consumer issues. Guidance on whistleblowing to the CMA updated. More guidance on making a competition or consumer law complaint published. The CMA cannot step in or advise on individual complaints. For help with your individual case or problem, contact the relevant consumer advice organisation in your area . The CMA cannot provide legal advice. Report competition, consumer or market problems to the CMA: Read our guide on what to expect when you report a potential breach of competition or consumer law . A cartel is when 2 or more rival businesses agree to act together instead of competing. Cartels are illegal and there are serious consequences if you are caught in one. If you are not involved in a cartel but know about one, report it to us. You could get a reward of up to £250,000 for information that leads to an investigation. Find out more about cartels and how to avoid them . If you or your business has been involved in a cartel, contact our leniency programme by phone: 020 3738 6833. Find out more about our leniency programme . The CMA is a ‘prescribed body’, which means you can tell us if you have information about your employer (or ex-employer) possibly breaking competition or consumer protection law. You can report wrongdoing that relates to any area of our work, such as mergers , consumer protection , competition enforcement and digital markets . You can report whistleblowing concerns to the CMA: Our guide to whistleblowing explains when and how to make a report, how we protect your identity, and what happens after you make a report. If you receive a call, email or letter claiming to be from the CMA and want to check it is genuine, contact our General Enquiries team: The CMA will only send emails from an email address ending ‘@cma.gov.uk’ and will never ask for bank account or payment details. If in any doubt, use contact details published on GOV.UK - either our General Enquiries team or the contact details on the relevant case page. Do not give out private information (such as bank details or passwords), reply to text messages, download attachments or click on any links in emails if you’re not sure they’re genuine. In some cases, you may want to report your concerns to an industry regulator: Contents Related content Is this page useful? Maybe Yes this page is useful No this page is not useful Thank you for your feedback Report a problem with this page Help us improve GOV.UK Do not include personal or financial information like your National Insurance number or credit card details. To help us improve GOV.UK, we’d like to know more about your visit today. Please fill in this survey (opens in a new tab and requires JavaScript ) .