One verified tonne, one serial number, one claim

One verified tonne. One serial number. One claim. That is the rule a reduction follows on Carbon3, from the supplier project where it happens to the moment a credit is retired against a Scope 3 claim.

The path has five stages, and each one leaves a record.

1. Register

It starts with a value-chain decarbonization project: a change at a supplier, carrier or other partner that the funding companies buy from. The project is registered on Carbon3 with its owner, its scope and the baseline the reduction will be measured against.

2. Verify

The reduction is measured against that baseline and checked by an independent verifier. Carbon3 does not verify reductions itself. The verification report is what turns a planned change into a confirmed number of tonnes.

3. Issue

The project developer issues inset credits on the Carbon3 registry, one credit per verified tonne of CO₂e. Each credit carries a serial number and stays linked to its project and its verification data. Carbon3 records the credits; it does not issue them.

The path described here is for realized credits, which follow the verification report. Carbon3 also supports future credits, which a project developer can issue earlier, once the project is validated, so funders can help finance the change before it delivers. Every credit shows which kind it is.

4. Allocate and trade

Credits are allocated to the companies that co-funded the project, or traded to other buyers. Every allocation and transfer is recorded against the credit's serial number, so ownership is always traceable back to the project.

5. Retire

Finally, a holder retires the credit against a Scope 3 claim. Retirement is recorded once, and a retired credit cannot be used again.

Why the record matters

The point of the five stages is that the same tonne cannot be claimed twice. Because every credit carries its serial number, its project and verification data, and a full history of transfers and retirement, a buyer, auditor or advisor can follow a claim back to the reduction behind it.

Inset credits are not offsets. They represent reductions inside a company's own value chain rather than compensation bought from projects outside it. They are also not EU ETS allowances or FuelEU Maritime compliance units.

What it costs

There is no fee to list a project or to issue credits. A commission applies on trades and retirements.

Claim treatment depends on the applicable reporting framework.

Source: Carbon3.