Reversal & invalidation risk

Invalidation risk refers to any scenario in which a carbon credit is deemed to have been incorrectly issued or labelled, or because a rule breach is discovered after issuance, leading to its cancellation.

In short: Reversal is the physical loss of stored carbon (e.g. due to wildfire) that undermines permanence; Invalidation is administrative failure (credits are cancelled because they’re no longer treated as valid).

Invalidation can be caused by: Fraud or misrepresentation (e.g. forged monitoring data; knowingly false baseline claims; hiding double-registration; fake project ownership/right-to-carbon); Methodology or accounting error leading to over-crediting (e.g. wrong emission factors or GWP values; incorrect leakage/permanence deductions; misapplied additionality tests; calculation mistakes discovered via audit or third-party challenge); Non-conformance found via quality control review (e.g. a complaint, internal detection, or registry operational review opens a quality control case); Legal orders / government action alleging unlawful conduct affecting the project (e.g. court order about land title fraud; regulator action for illegal operations; investigations that undermine the project’s legitimacy); Double counting / double claiming (where the same emission reduction is credited or claimed twice).

Reversal risk refers to any scenario in which carbon that has been credited as stored or avoided is later released (or the storage/avoidance is undone), so the credited climate benefit no longer holds.

Reversal can be triggered by events either unintentional or intentional. Unintentional reversal events may include: wildfire (credited forest carbon is physically combusted); drought and heat stress (increased tree mortality and decay, leading to higher fire susceptibility); pest outbreaks and disease (e.g., pathogen-driven mortality reducing biomass); extreme storms (e.g. hurricanes/cyclones); or flooding/landslides (loss of vegetation/soil carbon, especially in peat/blue carbon contexts). Intentional (human-caused) reversal events cover: illegal logging/unauthorised harvesting (i.e. the deliberate removal of biomass); land-use change (conversion to agriculture, mining, infrastructure, settlements); project non-compliance or poor management (actions that knowingly reduce carbon stocks (or fail to maintain them)); and conflict, governance breakdown, encroachment, basically any loss of control over the project area that leads to to clearing or degradation.