Why Due Diligence Is Non-Negotiable
The voluntary carbon market's credibility crisis of 2022–2023 — triggered by investigative journalism exposing systematic over-crediting in major REDD+ programmes — fundamentally changed the institutional approach to carbon credit procurement. What was once a 'trust-the-registry' model has evolved into a structured, multi-dimensional due diligence process that sophisticated institutional buyers apply to every tonne before purchase.
The ICVCM's Core Carbon Principles (CCPs), launched in 2023 and updated in 2024, provide the industry's most comprehensive quality framework — but CCP labelling is a minimum floor, not a ceiling. Institutional buyers with fiduciary obligations and reputational exposure need a proprietary due diligence framework that goes beyond registry label-checking.
The Five Pillars of Carbon Credit Quality
Pillar 1: Additionality Assessment
Additionality is the single most important quality criterion — a non-additional credit provides zero climate benefit and represents both a greenwashing liability and a misallocation of capital. Additionality assessment involves three tests applied in sequence. The regulatory surplus test asks whether the emission reduction is already required by law or regulation. The investment test asks whether the project is financially viable without carbon revenue. The common practice test asks whether similar activities are already widespread without carbon finance in the region.
The most contentious additionality cases involve renewable energy projects in jurisdictions where renewable buildout is already commercially viable (e.g., solar in India or MENA at post-2020 cost curves), and forest protection projects in areas with low documented deforestation pressure. Buyers should demand access to the project's validation report and cross-reference additionality claims against current economic conditions, not conditions at the time of project registration.
Pillar 2: Permanence and Buffer Pools
For nature-based projects, permanence risk is the probability that stored carbon is re-released before the claimed permanence horizon (typically 100 years). Verra's buffer pool mechanism requires projects to deposit a percentage of issued credits (typically 10–20%) into a shared insurance pool; if a reversal event (fire, drought, pest infestation, illegal logging) occurs, the lost credits are covered by cancelling buffer credits. However, institutional buyers should assess the adequacy of the buffer contribution relative to the specific reversal risks of each project.
For engineered removal credits (biochar, enhanced weathering, direct air capture), permanence risk is substantially lower — biochar carbonis stable for 100–1,000 years depending on feedstock and production temperature; geological CO₂ storage via DAC is effectively permanent. Buyers with long-term Net Zero claims should weight permanence heavily in portfolio construction, targeting a blend that matches the durability of their commitments.
Pillar 3: MRV Quality
Measurement, Reporting, and Verification (MRV) quality determines how accurately the emissions reduction is quantified. Key MRV quality indicators include: frequency of third-party verification (annual is better than triennial); use of remote sensing and IoT data alongside ground-truth surveys; conservative versus liberal baseline assumptions; and the vintage of the underlying methodology (old methodologies may not reflect current science on carbon dynamics, fire risk, or project degradation rates).
ICVCM Core Carbon Principles: The Minimum Floor
FAQ SECTION (Generates Rich Snippets)
Q: What is additionality in carbon credits?
A: Additionality means the emissions reduction would not have occurred without carbon finance. It is the most critical quality criterion — a non-additional credit provides no real climate benefit. The three standard tests are: regulatory surplus, investment analysis, and common practice.
Q: How do I evaluate carbon credit permanence?
A: Assess the permanence risk by reviewing the buffer pool percentage, reversal history for the project type and region, insurance coverage, and whether the project uses a jurisdictional approach (which reduces leakage and displacement risk). Engineered removals (biochar, DAC) offer significantly higher permanence than nature-based storage.
Q: What are the ICVCM Core Carbon Principles?
A: The ICVCM's CCPs are eight quality criteria covering governance, tracking, transparency, independent verification, additionality, permanence, quantification, and no-double-claiming. Credits that pass CCP assessment receive a label signalling minimum quality standards — but institutional buyers should conduct additional project-level due diligence beyond the CCP floor.
Q: How does CRBN.CREDIT help with carbon credit due diligence?
A: CRBN.CREDIT's Project Auditor aggregates validation reports, verification statements, remote sensing data, third-party research, and community impact assessments into a unified quality score for every project in our marketplace — enabling institutional-grade due diligence at scale without requiring a dedicated carbon research team.
Q: What is carbon leakage and how does it affect credit quality?
A: Carbon leakage occurs when protecting one area from deforestation or industrial emissions simply displaces the same activity to an unprotected area — generating no net climate benefit. Jurisdictional REDD+ approaches (protecting entire jurisdictions rather than individual project areas) substantially reduce leakage risk and are preferred for institutional buyers with rigorous Net Zero claims.
INTERNAL LINKING STRATEGY
| Pillar | Core Question | Key Risk | Assessment Method |
|---|---|---|---|
| Additionality | Would the project have happened without carbon finance? | Non-additional credits = zero climate benefit | Regulatory surplus test, investment analysis, common practice test |
| Permanence | Will the stored carbon stay sequestered? | Reversal events (fire, disease, conversion) | Buffer pool size, insurance, project risk rating |
| MRV Quality | How precisely is the reduction measured and verified? | Over-crediting from poor baselines or measurement | Baseline methodology review, verification frequency, MRV technology |
| Leakage | Does protection simply displace emissions elsewhere? | Illusory reductions — activity moves to adjacent area | Leakage belt analysis, jurisdictional approach assessment |
| Co-Benefits | What additional environmental and social value is generated? | Token co-benefit claims vs. genuine community benefit | CCBS certification, SDG mapping, community consultation records |
| CCP Principle | What It Requires | Status Impact |
|---|---|---|
| Effective governance | Robust institutional structures at standard level | Table stakes — non-CCP credits face buyer restrictions |
| Tracking | Unique serial numbers, registry listing, retirement tracking | Required for institutional procurement |
| Transparency | Public disclosure of project data and methodology | High importance for auditor review |
| Robust independent third-party validation & verification | Accredited VVBs, separation of validation/verification | Core quality signal |
| Additionality | Project-level additionality test required | Most debated criterion in VCM history |
| Permanence | Buffer pools, reversals addressed | Critical for removal credit claims |
| Robust quantification | Conservative, no-net harm, sound science | Determines credit credibility |
| No double claiming | Corresponding adjustments where relevant | Increasingly required by VCMI/SBTi |