A shipment of timber can carry a full set of paperwork and still not be what it claims to be. Certificates of origin, species declarations and chain-of-custody records can all be filled out correctly and still be incorrect when the documents describe what a supplier says happened, not what actually happened. Wood itself, on the other hand, cannot lie about what it is or where it grew. The gap between documented claims and physical reality is exactly where DNA testing has proven its value, which is why DoubleHelix has spent years building expertise in this area of supply chain traceability and verification.