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Guaranteeing the origin of European energy


AIB - "guaranteeing the origin of European energy"

AIB develops, uses and promotes a European, harmonised and standardised system of energy certification for all energy carriers: the European Energy Certificate System - "EECS".

EECS is based on structures and procedures which ensure the reliable operation of energy certificate schemes in Europe. These schemes satisfy the criteria of objectivity, non-discrimination, transparency and costs effectiveness, in order to facilitate the international exchange of guarantees of origin.

In order to further facilitate this, the AIB operates an inter-registry communications Hub.

In 2024 AIB has 37 members from 30 European countries (EU, EEA and Energy Community member states). All are Issuing Bodies appointed by their government to administer a system for Guarantees of Origin (GOs) for electricity. 30 of them are members of the EECS Electricity Scheme Group, meaning that they can issue EECS GOs and transfer those over the AIB HUB. ERE Albania, SEDA Bulgaria and COTEE Montenegro are in the application phase. There are 4 formal Gas Scheme group members: Gasgrid Finland, Enagas Spain, E-Control Austria and Conexus Latvia. During 2023, AIB welcomed GSE Georgia as observer of AIB.

In 2023, 988 million certificates, or 988 TWh were issued based on production date, 1.410 TWh was transferred (nationally and internationally) and 785 TWh were cancelled. The market for electricity GOs continues to grow.

The AIB also provides a knowledge centre for energy certificate authorities across Europe, providing and sharing advice and guidance.

Report with conversion rules

AIB led the drafting of a report with “Harmonised Rules for handling guarantees of origin for energy carrier conversion”, which is now finalised. The report proposes harmonised rules for energy carrier conversion, for issuing bodies and registry operators.  More here.

Interested in joining AIB?

If you are an issuing body for GOs or voluntary certificates and wish to join, then read more here. See a generic presentation about AIB and GOs or take a look at our Youtube channel, which contains videos about the AIB and guarantees of origin.
All these documents, presentations and information are developed by the AIB, its members and market parties.


AIB welcomes issuing bodies administering energy certificates for electricity, gas, hydrogen etc.

The AIB facilitates a forum for issuing bodies who administer a reliable system of internationally tradeable energy certificates. AIB now also facilitates independent decision making by gas issuing bodies on gas related aspects.

The European Energy Certificate System (EECS) provides a basic ruleset for energy certificates for all energy carriers and several purposes. The Electricity Scheme has been operational for almost two decades, the EECS Gas Scheme has been added in November 2019. The EECS Rules have also adopted rules that facilitate GO issuing following energy carrier conversion.

AIB operates a Hub for international trade of energy certificates, avoiding bilateral connections between registries. 600 TWh of electricity guarantees of origin were transferred internationally in 2019.

The EECS Gas GO Scheme fully facilitates guarantees of origin for gaseous energy carriers (including hydrogen) under article 19 of the Renewable Energy Directive 2018/2001, and their effective cross border transfer. It also facilitates voluntary data fields on the gas certificate, which can be used for other purposes (sustainability criteria, green house gas emission data, assessment reports certifying their value, etc). This is a building block towards also art. 25-31 of REDII certification and can be further developed.

AIB encourages and facilitates (aspiring) gas issuing bodies to join the EECS Gas Scheme Group and share experience, establish practice and further refine the rules.

More information on


AIB General Meeting

The AIB holds two General Meetings per year. The next General Meeting will take place on 30 May 2024. (Members only, observers on invitation).