Certificates contain the identification data of the person and his/her public key in an electronic form.

The public key allows to link, undoubtedly, a natural person and data for verification of electronic signature and to verify the person's identity.

Certificates on eOI are qualified.

The period of validity of the certificate is five years, and after expiry, persons between 18 and 65 years of age are required to apply for a new identity card.