AIB Annual Report 2025 is out now! Read it here!
AIB has published the Residual Mix and European Attribute mixes 2025. Check it out here!
We submitted our feedback to the EU Commission's call for consultation on the "Energy efficiency – rating scheme for data centres in Europe" and their call for evidence on the "Renewable Energy – Legal Framework after 2030". Find all submissions via our news section.
AIB has standardised energy certification for all energy carriers in Europe: the European Energy Certificate System - "EECS".
The European Energy Certificate System (EECS) provides a basic ruleset for energy certificates for all energy carriers and several purposes. EECS is based on structures and procedures that ensure the reliable operation of energy certificate schemes in Europe. These schemes meet the criteria of objectivity, non-discrimination, transparency, and cost-effectiveness to facilitate the international exchange of guarantees of origin.
AIB operates an inter-registry communications Hub connecting all national registries for international trade of energy certificates. We documented 70.000 transfers and 1.161 TWh exchanged in 2025 while surpassing the of milestone of 10.000 TWh EECS GOs issued since our foundation.
Furthermore, we provide a knowledge centre for energy certificate authorities across Europe, in which our members share experience, advice, and guidance.
The Electricity Scheme has been operational for almost two decades; the EECS Gas Scheme was added in November 2019. The EECS Rules have also adopted rules that facilitate GO issuing following energy carrier conversion.
The EECS Gas GO Scheme fully facilitates the issuance of guarantees of origin for gaseous energy carriers (including hydrogen) under Article 19 of the Renewable Energy Directive 2018/2001, as well as their effective cross-border transfer. It also facilitates the inclusion of voluntary data fields on the gas certificate, which can be used for other purposes (sustainability criteria, greenhouse gas emission data, assessment reports certifying their value, etc.). This is a building block towards also Art. 25-31 of the REDII certification, and can be further developed.
AIB has 42 members from 36 European countries (EU, EEA and Energy Community member states) in June 2026. All are Issuing Bodies appointed by their government to administer a system for Guarantees of Origin (GOs) for electricity and gas.
30 of them are members of the EECS Electricity Scheme Group; thus, 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 15 formal Gas Scheme group members: E-Control, Austria; Brugel, Belgium-Brussels; OTE, Czechia; Elering, Estonia; Gasgrid, Finland; GSE, Italy; Conexus, Latvia; VertiCer, Netherlands; REN, Portugal; Enagas GTS, Spain; Pronovo, Switzerland; Amber Grid, Lithuania; EEX, France; SPP Distribucia, Slovakia; MEKH, Hungary - all connected to the AIB Hub.
In 2025, over 1.094 TWh of Guarantees of Origin, were issued based on production date, with over 978 TWh is being cancelled. AIB processed 72.966 transfers of GOs via the AIB Hub, which makes over 1,160 TWh (nationally and internationally).
In 2025, AIB also passed the threshold of 10 000 TWh EECS GOs issued since AIB was established.
These figures highlight the continued growth and dynamism of the electricity GOs market. Check out all current AIB activity data in our EECS GO dashboard.
AIB membership and Hub connection are distinct processes, involving two phases: AIB membership and joining the EECS Electricity and/or Gas Scheme, including Hub connection.
To become an AIB member, an issuing body must fill out an application form, commit to comply with the EECS Rules, and be approved by the AIB Board and General Meeting. Members pay a fee, can attend all meetings, and access the Members section of the website, but they can't vote.
Next, to join the EECS Scheme, members must draft a Domain Protocol, obtain insurance, sign a Hub Participant Agreement, and test registry software. After a thorough AIB review, the member gains Scheme Membership through a decision of all members and connects to the AIB Hub, allowing the import, issuance, and export of EECS GOs.
This second phase can take 6 months to 1-2 years, depending on resources, registry status, and national legislation changes.
