You can use the eSeal certificate from Digidentity for the EPREL registration. With the eSeal certificate you can sign the verification document, which allows your company to register.
If you want to know how to sign your document please click here.
Digidentity does not provide management support for EPREL registration. Should you have any questions regarding EPREL registration, please contact EPREL directly via ener-eprel-helpdesk@ec.europa.eu.