Multi Site Chain of Custody Credit Ledger Fundamentals
Multi-site chain of custody credit ledgers centralize certified fiber allocations across eligible sites under strict conversion and 24-month expiration limits.
PEFC ST 2002: 2020
Chain Requirement
Chain of custody certification defines the document trail for forest based material flowing from a primary harvest site through manufacturing stages to final consumer packaging. This pefc st 2002: 2020 protocol establishes the mandatory management system settings that entities must install to track certified raw inputs during physical transformation or chemical processing. It ensures that wood and fibre volumes tracked within a facility align with the outputs delivered to the next buyer by limiting credit allocations to verified purchase quantities.
The framework applies to any business handling logs, pulp or finished paper substrates that seeks to communicate the sustainability status of their source material to a printing or converting counterparty.
Systemic Verification
Administrative controls inside this standard mandate the calculation of specific conversion factors to account for weight loss or fibre yield variance during pulping and sheet finishing. Mill operations must maintain balance sheets that record the mass of certified input against the production yield of commercial packaging grades within defined time intervals. Auditors verify these records to ensure that the sum of certified outgoing material never exceeds the volume of verified incoming mass.
Any deviation in moisture content or trim waste requires documented adjustment procedures that allow for precise physical mass balancing across a facility.
Processing Tolerance
Production lines typically face constraints where certified and non certified fibre batches coincide on the same equipment during high volume output cycles. This requirement forces a physical segregation or a controlled percentage calculation to prevent the dilution of claims when mass balance accounting methods remain the only path for mixed substrate streams. Converting plants mitigate risk by isolating specific production runs or applying weighted average calculations that match the certified input ratio to the output of a specific print run.
Compliance demands that the conversion process remains transparent so that a commercial buyer receives documentation that matches the precise volume of certified fibre contained in the finished box or label stock.
Paperboard Recycled Content Verification Essentials for Retail Compliance
Recycled paperboard verification requires valid chain of custody certificates, mass balance ledgers, and lab migration test reports to clear retail compliance.