This European Standard specifies requirements for Guarantees of Origin of Electricity from all energy sources. This standard will establish the relevant terminology and definitions, requirements for registration, issuing, transferring and cancellation in line with the RES, Energy Efficiency and IEM Directives. This standard will also cover measuring methods and auditing procedures. These Guarantees of Origin may be traded and/or used for Disclosure/Labelling. The content of this standard can, for example, be applied, after necessary modifications, to heating, cooling, and gas (including biogas). These modifications are not part of this standard. This European Standard will not establish any sustainability criteria, this work is done elsewhere. This standard is suitable for certification purposes.