Guarantees of origin

The system managing the guarantees of origin for renewable gases can be reached at

Functionalities available include registration as an account holder and registration of production devices. Further functionalities as Issuance of GOs or GO transfer will be commisioned in the comming months.


The system managing the guarantees of origin for renewable gases can be reached at


Find here all the information regarding the setting of the system that will manage the guarantees of origin for renewable gases in Spain. All the contents included in this site will migrate to once the System is fully developed.

A guarantee of origin is an electronic document that certifies the renewable character of 1 MWh of gas while detailing its production particular features: when and where it was produced, the type of production facility and the energy source among others.

Guarantees of origin (GO) have the sole function of showing to a final customer that a given share or quantity of energy was produced from renewable sources.

The following regulation applies to GOs in Spain:

  • Royal Decree 376/2022,  establishes a GO System to manage guarantees of origin for gas, and appoints GTS (the Tehcnical Manager of the System) as responsible entity as long as the Ministry doesn’t have the necessary human and technical resources to do so.
  • Ministerial Order TED/1026/2022,  sets the management procedure defining the rules to be followed by the System. The management procedures sets the framework for the development of the IT system.
  • List of additional public documents, defined by chapter 11 of the management procedure including a higher level of detail to be published by Enagás GTS as the responsible entity.

According to Royal Decree 376 the GO System shall be operational within 6 months since the publication of the management procedure. However, the recent governmental  Plan +SE (more energy security) establishes two milestones for its commissioning:

  • January 2023: registration of users and production facilities.
  • March 2023: issuing of guarantees of origin.

Therefore, Enagás GTS has adopted a compromise to have the GO system ready, with all its basic functionalities by March.

For further information or doubts, please contact us in You can also submit  you question at the following link.


The drafting of the Management Procedure went through a robust consultation process:

  • Enagás GTS public consultation,  that took place before the submission to the Ministry of a GTS proposal of a management procedure.
  • Ministry’s public consultation on the Proposal of the Ministerial Order approving the management procedure.
  • CNMC report on the Proposal of the Ministerial Order approving the management procedure.

The management procedure  includes a number of modifications from the documents previously consulted. The document “FAQs regarding the management procedure” updates the questions received during the public consultation with the adaptation of the answers to the Management Procedure as has been approved.



Royal Decree 376 establishes that a Committee of Subjects shall be created by the Responsible Entity. The aim of this Committee is:

  • To be informed about the functioning and the management of the GO System.
  • To elaborate proposals that may improve its  functioning, including the submission of proposals for the modification of the management procedure to the Ministry.

The Committee of Subjects will be ruled by internal functioning rules to be approved by the Committee itself, that will include:

  • Voting rules for the election of a President and a Vice-president.
  • A procedure for the election of representatives, vote delegation rules, including if applicable a limitation in number per account holder category.
  • Detailed functions to be carried out by the Committee.
  • Code of conduct.
  • Periodicity of the sessions, procedures and means of notification.
  • A procedure for the adoption of agreements.
  • Mechanism for the acceptance of new members in the Committee.

The chapter 10 of the management procedure defines the requirements to be a member of the Committee of Subjects, distinguishing between two different types of members: full members (with voice and voting rights) and members with voice but no voting rights. In order to be a Full member, a stakeholder will have to be registered as Account Holder in the GO System.

The formal establishment of the Committee of Subjects must happen after the commissioning of the GO System, on a later stage, in order to allow a previous registration of account holders and production facilities. By doing so, the initial voting for the election of the President and Vice-president, as well of the approval of the Internal Functioning Rules may be robust, having a sound representation of the various types of account holders.

Even though the formal foundation of the Committee of Subjects is not happening shortly, Enagás GTS has established an open GO working group, as a sort of a pre-Committee of Subjets in order to deal with the management procedure, the list of additional public documents and the development of the IT systems.

In case you want to be included in the GO working group distribution list, please let us know at




Additional public documents


The chapter 11 of the management procedure distinguishes between two different types of documents: detailed procedures and manuals, questionnaires and informative guides. The full list can be foud here.

In the future, the list of additional public documents will remain updated in the website of the GO System, currently under development. For the time being they will be published in the Guarantees of Origin section of Enagás website.

To be published by Enagás GTSD as responsible entity after consultation of the “Committee of Subjects”.

  • A1. Metering requirements.
  • A2. Requirements applicable to Auditing bodies.
  • A3. Auditing requirements.
  • A4. Participation contract template for Account Holders.
  • A5. List of members of the “Committee of Subjects"*
  • A6. Energy Sources: coding detail
  • A7. Production techologies: coding detail

(*) Pending formal establishment of the Committe of Subjects

To be published by Enagás GTS as responsible entity. These documents include calculation examples, templates and samples of documents to be published by the GO System.

  • B1. Glossary
  • B2. Registering instructions. How to start operating in the GO system.
  • B2. User manual - GO Platform*
  • C1. Account holder - Registration form
  • C2. Production device - Registration form
  • D1. Example - consumption declaration file*
  • D2 - Example -  demand declaration file - consumption points*
  • D3 - Examples - Net production calculation*
  • D4 - Examples - GOs, cancellation statements and residual mix certificates (fictional)

(*) Pending publication


Most of the documentation is temporarily available only in Spanish, translated versions into English will be published shortly. Please feel free to address us in English if it suits you better.