akar.earthValidation: Definition
What is validation in carbon projects? How an independent auditor checks the project design before registration, what it covers, and tips for Indonesia.
Validation is the independent assessment of a carbon project’s design against the rules of a standard and methodology, carried out before the project is registered. An accredited auditor checks that the project design document is complete, correct and conservative.
Why it matters
Validation is the first external check on a project’s integrity. It confirms that the baseline, additionality, boundaries, monitoring plan and calculations meet the methodology. A project cannot be registered, and so cannot issue credits, without a positive validation opinion. Buyers and investors read the validation report as evidence that the design is sound.
How it works
- The proponent prepares the project design document.
- The programme publishes the project for public comment, where required.
- A VVB reviews documents, interviews stakeholders and usually visits the site.
- The VVB raises findings (clarification requests, corrective action requests) that the proponent must close.
- The VVB issues a validation report and statement, and the programme reviews it before registration.
Validation is often combined with the first verification to save time and cost. Auditors follow ISO 14064-3 principles and programme-specific rules. See our page on validation and verification bodies.
Indonesia angle
Indonesian validations often focus on land tenure (PBPH, social forestry permits, customary forest recognition), community consent and benefit sharing, and alignment with domestic rules under Perpres 110/2025 and Permenhut 6/2026. Site visits to remote areas in Kalimantan, Papua or Maluku add time and cost, so organised field data and clear maps help. Our validation and verification support prepares projects for these audits.
Common mistakes
- Submitting a PDD with calculations that cannot be reproduced from the data.
- Missing evidence for land rights or community consent.
- Using an outdated methodology version.
Related terms
See verification, VVB and project design document, or browse the carbon standards hub.
Frequently asked questions
What is the difference between validation and verification?
Validation checks the project design before or at registration. Verification checks measured results after a monitoring period, and leads to credit issuance.
How long does validation take?
It varies with project complexity, auditor availability and how many findings must be resolved. Good documentation and clean data are the main ways to shorten it.