This document complements the revised ISEAL Chain of Custody Models and Definitions guidance v2.

The following diagrams provide worked examples of how certified materials move through different supply chains, illustrating segregation, controlled blending, and mass balance approaches. They are strictly illustrative – real supply chains are complex, context-specific, and may vary depending on local practices, ownership structures, and processing steps.

These examples focus on the main product flow; by-products or waste from production account for the remainder of the material.