A Guarantee of Origin (GoO) is a tradable commodity that represents a claim to the environmental benefits associated with renewable power generation.

GoOs are traded electronically in the voluntary market for renewable energy certificates and are not tied to the physical delivery of electricity.

A GoO indicates the generation of one-megawatt hour (MWh) of electricity from an eligible source of renewable power. Each GoO denotes the underlying generation source, location of generation, and year of generation. The trading market in Europe includes GoOs from wind, hydropower, solar PV, geothermal and biomass sources for now.

As of 1 January 2021, the EU no longer recognizes UK REGOs. The UK Government will cease to recognize EU GoOs from April 2023 but will continue to accept them for the 2022/23 reporting period.

Aureus Energy are currently not involved in the purchasing or selling of Guarantees of Origin in the European Markets