Two words doing opposite jobs

The audit is where they diverge

What ‘attached’ actually means

Why the distinction is load-bearing

Why inventory-linked performance and compensation-elsewhere are opposite instruments — and why only one lands in Category 1.

Two instruments get filed under the same word, and the filing error is expensive. A carbon offset and a Carbon Inventory Certificate both speak in tonnes of CO₂e, and there the resemblance ends.

One compensates for emissions somewhere else. The other records what actually happened to the goods you bought. When an auditor arrives, that distinction stops being semantic and starts being the whole conversation.

An offset is compensation. You emit here; a project reduces or avoids emissions there — a forest, a cookstove, a landfill capture — and you buy the difference. The reduction is real or it isn’t, but either way it is detached from your supply chain . Nothing about the goods on your purchase order changed.

A Carbon Inventory Certificate is inventory. The reduction is measured at the source of a commodity you actually buy, and it stays attached to that commodity as it moves downstream. You are not buying someone else’s good deed — you are documenting the performance of your own supply.