Energy guarantees of origin (GOO) will be an essential instrument in the context of the Commission’s forthcoming legislative proposals on the regulatory framework for facilitating the emerging low and renewable carbon hydrogen market and a concomitant substantial decrease in GHG emissions. GOOs will be required to enable customers to determine the source of, and above all GHG content of, the hydrogen they purchase. They will be important in facilitating trade and in developing a liquid EU-wide hydrogen market. GOOs should cover all forms of renewable and low-carbon hydrogen, on an objective life-cycle basis.