ClearSky

MITECO registry guide

Spain’s carbon registry.
How compensation works.

MITECO runs a public registry. Organisations record their carbon footprint. Forestry projects record the CO₂ they absorb. A compensation links the two.

The registry

Three sections.

Royal Decree 214/2025 of 18 March sets up the registry. MITECO runs it.

01

Carbon footprint

An organisation records its footprint for a year and its plan to reduce it.

02

Absorption projects

Forestry projects in Spain record the CO₂ they will absorb. Each commits to at least 30 years and files a monitoring report every 5 years.

03

Compensation

An organisation with a registered footprint uses absorptions from registered projects to compensate part or all of that year’s footprint.

The seal

Calculo.
Reduzco.
Compenso.
01
Calculo

The footprint for the year is registered.

02
Reduzco

Emissions have fallen, by MITECO’s criteria.

03
Compenso

Part or all of the footprint is compensated with absorptions from registered Spanish projects. The certificate shows the share compensated.

MITECO grants the seal. ClearSky does not.

Required or voluntary

Calculating can be required. Compensating is voluntary.

Royal Decree 214/2025 requires some large companies and state public bodies to calculate their footprint and publish a reduction plan. State public bodies must also register it. Compensation is always voluntary. It comes after reduction, not instead of it.

How a compensation works

Five steps, from footprint to seal.

  1. 1

    You

    Register your footprint

    Only a registered footprint can be compensated. Register it first.

  2. 2

    You and ClearSky

    Buy absorptions

    You buy tonnes of absorbed CO₂ from a project registered with MITECO. One unit is one tonne. The minimum is 1 tonne.

  3. 3

    ClearSky

    Transfer

    We file the transfer of the tonnes to you. MITECO records it and issues a transfer code: a d followed by seven digits. The code shows you hold the tonnes.

  4. 4

    You or your representative

    File the compensation

    The compensation is filed on MITECO’s e-office with the transfer code and a digital certificate. An authorised representative can file it for you.

  5. 5

    MITECO

    MITECO decides

    MITECO has three months to resolve. If it does not answer in that time, the application counts as accepted. Once recorded, your seal shows Compenso for that year.

Who does what

We develop and transfer. MITECO decides.

ClearSky

  • Develops reforestation projects and applies to register them
  • Sells absorptions by the tonne
  • Files the transfer of your tonnes
  • Supports your compensation filing

MITECO

  • Runs the registry
  • Decides which projects are registered
  • Records transfers and compensations
  • Grants the seal

Timelines

How long it takes.

Compensation filing

Three months for MITECO to resolve.

Registered credits

Transferred once the sale is agreed.

Forward credits

Delivered after MITECO registers the project. Registration is not guaranteed.

Credits

Register interest.

Tell us the tonnes and the footprint year.

Register interest See the projects

Official sources

  1. Real Decreto 214/2025, de 18 de marzo (BOE, texto consolidado)
  2. MITECO: Registro de huella de carbono, compensación y proyectos de absorción de dióxido de carbono
  3. MITECO: Inscripción de compensaciones de huella de carbono
  4. MITECO: Preguntas y respuestas sobre compensación
  5. MITECO: Inscripción de proyectos de absorción
  6. MITECO sede electrónica: Solicitud de compensación (procedimiento)

A summary, not legal advice. The official texts prevail. MITECO determines registration and seal eligibility. ClearSky supports the process and does not grant the seal. Compensation complements emissions reduction.