https://www.epo.org/en/node/how-should-existing-suppliers-log-epo

How should existing suppliers log in to the EPO procurement portal?

If you have not received an invitation email from the EPO, please email supplier@epo.org. Kindly note that the initial credentials are valid for seven days. After seven days, a new invitation is required.

The invitation email contains a link to the Ivalua platform, where existing suppliers can set a password and then log in to the portal.