The European Renewable Gas Registry (ERGaR aisbl) is an international non-profit organisation enabling cross-border transfers of green certificates for biomethane and renewable gases.

Amongst its 26 members, ERGaR counts renewable gas registries, renewable gas industry associations, gas DSOs/TSOs and natural gas industry partners.

ERGaR is currently establishing an independent, transparent and trustworthy documentation scheme for mass balancing of biomethane (biogas upgraded to natural gas quality) and other renewable gases distributed along the European gas network. Thanks to the experience of national registries, the documentation system will enable cross-border transfer of certificates for renewable gases via the European natural gas network while preventing double sale and double counting.