Please contact us

For any further questions about on-site audits, audit reports, certificate decisions, or how you can begin implementing the 4C Code of Conduct, please get in touch!

How to find us

4C Services GmbH
(former CAS)
Hohenzollernring 72
50672 Köln, Germany

Tel: +49 221 508020 50
Email: info@4c-services.org