Guidance for organisations on presenting Guarantees of Origin (GoOs) for use in GB Fuel Mix Disclosure (FMD) and Feed-in Tariffs (FIT) annual levelisation


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This guidance supersedes previous versions and must be used when presenting GoOs for 2017/18 onwards.

This guidance note details how suppliers should provide information to Ofgem when presenting Guarantees of Origin (GoOs) for use in Great Britain (GB) Fuel Mix Disclosure (FMD) and Feed-in Tariff (FIT) annual levelisation. It will also provide the basis upon which we will advise the Low Carbon Contracts Company (LCCC) in its determinations of Green Excluded Electricity (GEE) under Contracts for Difference (CFD).

For more details on Ofgem’s function on recognising EU GoOs, please refer to our Renewable Energy Guarantees of Origin (REGOs) guidance for generators, agents and suppliers.

This document is for guidance only. It is not comprehensive legal advice on how the legislation should be interpreted. The onus is on the particular generator, agent or supplier to ensure they are aware of the requirements of the legislation and licence conditions.

The RE Compliance team, which is part of the Renewable Electricity Directorate of Ofgem, administers the EU GoOs recognition process for FMD.

You can contact us by emailing the RE Compliance team at