akar.earthVerification: Definition
What is verification in carbon markets? How an independent auditor checks monitored results before credits are issued, and what Indonesian projects need.
Verification is the independent, periodic audit of a carbon project’s monitored results, carried out after each monitoring period. An accredited auditor confirms that the emission reductions or removals claimed in the monitoring report actually happened and were calculated correctly. A positive verification is the condition for issuance of credits.
Why it matters
Validation checks the plan; verification checks the results. It is the point where field data, satellite analysis and calculations are tested against reality. Credit volumes, buffer contributions and the project’s reputation all depend on it. Rating agencies and buyers read verification reports to judge data quality.
How it works
- The proponent prepares a monitoring report covering the monitoring period.
- A VVB reviews the report and underlying data, re-runs calculations and visits the site.
- During the site visit, auditors re-measure a sample of plots and trees, check boundaries and interview stakeholders.
- Findings are raised and closed.
- The VVB issues a verification report and statement, and the programme reviews it before issuing credits.
The first verification is often combined with validation. Rules on how often verification must happen, and what happens if it lapses, differ by programme.
Indonesia angle
Verification in Indonesia is often limited by field logistics and data quality: remote sites, many smallholder plots, and records kept on paper. Projects that collect georeferenced plot data with photos, keep tree IDs consistent between campaigns and store data in an auditable pipeline tend to have smoother verifications. Units destined for IDXCarbon must also be recorded in SRUK, which brings domestic verification requirements into play alongside the international standard.
Common mistakes
- Changing plot locations or measurement protocols between monitoring periods without an approved deviation.
- Missing raw data that auditors need to reproduce results.
- Not reporting loss events that occurred during the period.
- Leaving long gaps between verifications, which can trigger penalties.
Related terms
See validation, VVB and monitoring report, or browse the carbon standards hub.
Frequently asked questions
How often are carbon projects verified?
It depends on the programme and the project. Many forest projects verify every few years. Some programmes set a maximum gap between verifications, after which the project may face penalties or buffer consequences.
What does a verifier check?
That the monitoring report follows the registered monitoring plan, that data are accurate and complete, that calculations are correct and conservative, and that no reversal or non-conformity has been hidden.