What to Ask Before You Claim a Carbon Credit

I've spent years explaining sustainability standards to people who don't want a lecture — they want to know what's real. So here's the plain version: a carbon credit represents a quantified mitigation outcome, typically one tonne of carbon-dioxide equivalent. That's it. Issuance alone doesn't prove the reduction or removal is additional, durable, or accurately measured. You have to check.

Quality lives at two levels

The ICVCM's Core Carbon Principles set out what robust quantification looks like: additionality, permanence, independent verification, tracking, transparency, safeguards, and no double counting. But here's the part people miss — assessment happens at both the program level and the credit-category level. The CCP label applies to approved categories, not automatically to every credit a program issues. So a program being approved doesn't mean every methodology under it qualifies.

Verra's VCS is a program, not a promise

I often hear "it's Verra-certified" used as shorthand for quality. It isn't. Verra's Verified Carbon Standard is a crediting program. The ICVCM reports that VCS Version 4.7 was approved in May 2024, and identifies particular VCS methodologies and frameworks approved against its assessment criteria. That's a meaningful signal — but it's category-specific, not blanket. You can read more on Verra's announcement and the VCS rules archive.

Article 6.2 is not the voluntary market

These get conflated constantly. Article 6.2 concerns voluntary cooperation between Paris Agreement Parties using internationally transferred mitigation outcomes — ITMOs — toward NDCs or other authorized international mitigation purposes. It is not simply another name for a voluntary-market credit. A corresponding adjustment is a national accounting treatment: adjustments to participating Parties' emissions balances for authorized ITMOs, intended to avoid double counting. Don't assume every credit carries one. Verify the authorization, transfer, and intended use. The Article 6.2 guidance and reporting materials are worth reading directly.

What to ask before you claim

Ask what claim the credit is intended to support. Is it a corporate climate claim or an authorized international purpose? Identify any authorization or corresponding-adjustment status. The CCPs separately identify double issuance, double claiming, and double use as forms of double counting — so precision matters.

• What is the baseline assumption, and how was additionality tested?
• What do the monitoring and verification records show?
• How is leakage addressed?
• What are the reversal risks and permanence arrangements?
• What social and environmental safeguards apply?
• What are the credit identifiers, and can you confirm registry entries and retirement records?

ICVCM principles call for credits to be uniquely identified and tracked in a registry, with mitigation information public and transparent. Get the identifiers. Confirm the entries. Don't take a logo as proof.

Separate valuation from integrity

For a valuation or audit file, document the asset or transaction being assessed: credit vintage, project and methodology, quantity, registry status, restrictions, and intended use. Do not infer market value or claim quality solely from a standard's name. The sources I've cited establish integrity criteria — they do not provide Hong Kong-specific valuation requirements or current market prices.

One more caution: some search results carry later dates than today, so I can't treat those as verified current facts. And these sources don't establish applicable Hong Kong IFRS/HKFRS or IVS requirements. Consult the relevant issued standards and professional guidance before making accounting or valuation conclusions. If you want the fuller walkthrough, Carbon Credits Made Simple is a good place to start.