The EU Renewable Energy Directive of 2001 has a system for tracking the guarantees of origin (GOs) of renewable electricity. The tracking is instrumental to the reliable authentication of claims about the origin of a certain quantity of final energy. European law stipulates that guarantees of origin are to be used to prove the share of renewables in total deliveries of a supplier to customers. The system has been criticised among other, for a lack of environmental credibility and for having little impact. The seminar will discuss actual and perceived wekanesses and expolre ways to address these and provide additional, consumer-driven income streams to help realise new renewable energy projects in the future.