Report a cartel, abuse of dominance or abuse of buyer power to the Competition Authority
Competition Authority of Kenya · sources read 2 Oct 2026
Anyone can report a cartel, abuse of dominance or abuse of buyer power to the Competition Authority. Create an account on the CAK e-filing portal, pick File a Complaint, fill the form and upload your evidence. It's free.
- Fee
- We couldn't confirm a fee from the official page. Check it there before you pay.
- How long
- First review within 14 days of full information; complex cases up to 180 days
- Where
- Online on the CAK e-filing portal (competition.cak.go.ke:444). CAK offices: CBK Pension Towers, 15th Floor, Harambee Avenue, Nairobi
What you need
- Evidence, for buyer power cases: contracts, LPOs, delivery notes, invoices, goods received notes and messages between you
- Attachments in PDF format
- A confidentiality claim form, if you want parts of your information kept confidential
Steps
- Create an account on the CAK e-filing portal (competition.cak.go.ke:444) and log in.
- Open File a Complaint and pick Restrictive Trade Practices Complaint (cartels, abuse of dominance) or Abuse of Buyer Power.
- Fill every section first, then upload your evidence as PDFs and submit.
- You get an automatic confirmation. Follow your case on the portal and answer any CAK request for more information or an interview.
Watch out
- CAK expects complaints on matters that are not already before a court or the Competition Tribunal.
- If your own company is in a cartel, the first to come forward under the leniency programme can get full immunity from penalties.
- A complaint about being overcharged or misled as a shopper is a consumer complaint, which CAK handles separately.
Who can apply
- Anyone can complain to CAK about restrictive trade practices.
- Cartels: agreements or coordinated conduct between businesses that prevent, distort or lessen competition.
- Abuse of dominance: being big is allowed, abusing that position is not (for example unfair prices or blocking market access).
- Abuse of buyer power: for example a big buyer paying suppliers late without good reason, or delisting them unfairly.
Official sources (7)
- Enforcement and Compliance FAQ cak.go.ke · read 2 Oct 2026
- Abuse of Buyer Power cak.go.ke · read 2 Oct 2026
- CAK Portal RTP Complaint Filing Instructions cak.go.ke · read 2 Oct 2026
- CAK Portal Abuse of Buyer Power Complaint Filing Instructions cak.go.ke · read 2 Oct 2026
- Citizens' Service Delivery Charter cak.go.ke · read 2 Oct 2026
- Competition Authority of Kenya (home page) cak.go.ke · read 2 Oct 2026
- CAK e-filing portal competition.cak.go.ke · read 2 Oct 2026