The objective of WP3 is to review all past and existing initiatives to set up GoOs systems, particularly on-going and past initiatives to certify green electricity, green gas, and bio-fuels and other relevant energy vectors.

This will result in a set of principles and requirements for the new system for guarantees of origin for green hydrogen. Composed of four tasks, WP3 will first review and compare existing platforms and tracking systems for guarantees of origins, comparing the different systems, analysing strengths and shortcomings and extrapolate the main technical and legal aspects. It will then analyse all interactions between existing GoO and green hydrogen, benchmarking existing GoO schemes in Europe with schemes in other similar areas. The results of WP3 will be validated via a number of external stakeholder interviews.