EECS certificates have standard contents. They contain information about:

• the issuer
• the time and date of production
• the source of the energy and the technology used to convert it into its current form
• the identity, capacity, commissioning date and location of the generation plant
• units of energy (e.g. megawatt hours)
• the purpose and eligibility of the certificate under various schemes and Directives, and whether other certificates have been issued for this unit of energy
• whether public support has been received by the plant (investment support) or the owner of the associated energy (production support).

This information is presented in a standard way, using agreed codes, data formats and rules. EECS certificates also have quality criteria: the certificate issuers are bound by a code of conduct prohibiting such matters as issuing several certificates for the same energy, and forbidding them to take a position in the market.

EECS certificates may be transferred to accounts registered in databases managed by other certificate issuers by means of the EECS network.