Like-for-Like Substitution in Carbon Claims and Contracts

Like-for-like substitution is the principle that a substitute credit used to replace a failed or undelivered unit must match the original on material attributes such as project type, durability, vintage and co-benefit profile. It sits inside Carbon Credits and connects directly to how projects are documented, financed, and judged.

Contracts and standards define which attributes must match before a replacement is accepted. When a delivery fails or a reversal occurs, the responsible party supplies units meeting those criteria, and the substitution is recorded so the original claim remains traceable. Mismatches require disclosure or a price adjustment. Where exact matching is impossible, good contracts require disclosure and a price adjustment, so the buyer can decide whether to accept a weaker substitute or seek redress elsewhere.

Without matching rules, a durable removal can be replaced with a cheap short-lived avoidance credit, and the buyer's climate claim silently weakens. Requiring equivalence protects the integrity of the original commitment and prevents downgrade by substitution. The principle also matters in portfolio management, because a fund that promises removal tonnes to its clients cannot meet that promise by substituting avoidance credits after a delivery failure. Clarity about Like-for-like substitution is what lets buyers, sellers, and regulators compare like with like instead of trading on assumption.

Regulators, standards bodies, and market participants each bring a different lens to Like-for-like substitution, which is why shared definitions and reliable records matter so much. When everyone works from the same facts, disputes shrink and confidence grows.

Definitions of like-for-like are vague in many contracts, leaving room for substitution that satisfies the letter but not the intent. Buyers often discover the downgrade only at retirement, when the claim has already been reported. Enforcement is weak where the original credit has already been retired, since the substitution happens off-registry and the retired record may never be updated.

CarbonFi enforces substitution rules at the registry level, blocking a replacement whose type or durability does not match the original slot, and records the swap in the credit's history. CarbonFi also records the reason for each substitution, so a pattern of repeated downgrades by the same developer becomes visible to future buyers. For teams working across CarbonFi, Like-for-like substitution is not abstract: it maps onto concrete steps in verification, issuance, trading, or retirement, each of which can be recorded and checked on-chain.