VocabChain of Custody Methodcode list · 6
Chain of Custody Method UN/CEFACT code list.
Concepts (6)
| Label | Notation | Definition |
|---|---|---|
| Book and claim | book-and-claim | The physical material and the claim are fully decoupled, with credits for the claimed attribute issued and traded independently of the goods. |
| Controlled blending | controlled-blending | Conforming and non-conforming material are physically mixed in a known, fixed proportion, and that proportion is tracked through production. |
| Controlled mass balance | controlled-mass-balance | As mass balance, except that every input must meet a baseline set of requirements, with volumes meeting further criteria reconciled administratively. |
| Identity preservation | identity-preservation | Material from a single specified source is kept physically separate from all other material throughout the chain. |
| Mass balance | mass-balance | Conforming and non-conforming material are physically mixed, and the conforming volume is reconciled administratively against the volume of output sold as conforming. |
| Segregation | segregation | Conforming material from several sources may be combined, but is kept physically separate from non-conforming material. |
Mappings & provenance
| source | https://isealalliance.org/get-involved/resources/chain-custody-models-and-definitions-v2-2025 |
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