https://www.epo.org/en/node/what-do-i-need-do-access-epos

What do I need to do to access the EPO's Central Fee Payment service?

You can access the EPO’s Central Fee Payment service either via your smart card (and smart card reader) or e-mail address and password and an internet browser. In order to access the CFP, you need a deposit account with the EPO.

Additionally, if you use a smart card, your company administrator must grant you access to the company portal.