https://www.epo.org/en/service-support/faq/about-us/reporting-wrongdoing/can-i-report-anonymously

Can I report anonymously?

You can share your identity with us or remain anonymous. If you remain anonymous, please consider giving us a means of contacting you (such as an email address). By doing so, we can get back to you for clarifications, feedback, or requests for supporting documentation. If you do not know how to create an email address not linked to your identity, please search the internet for "anonymous email". We will not actively seek to identify you. Please consider that if you report anonymously and without providing a means of contact, we may not be able to follow up on your report if the information you provide is too scarce, and we will not be able to inform you about any follow-up.