YKK India · Plant 1 & Plant 2
A one-time encrypted barcode is bonded to the vehicle at the tare weigh and checked at every gate it passes. The chassis number travels sealed inside the code, so a cloned number plate proves nothing and a sticker moved to another vehicle is refused on sight.
Why this exists
A vendor weighed an empty vehicle at Plant 1, drove out, and presented a different one at Plant 2 — same colour, same plate. The second vehicle was heavier. The difference was billed as material that never existed.
Nothing in the process was wrong on paper. Both weighbridges worked. The gap was that no unique, tamper-evident identity was tied to the physical vehicle after the tare weigh, and a number plate can be copied in an afternoon.
Weighed at Plant 1
8,240 kg
Tare recorded. Vehicle departs.
Presented at Plant 2
8,820 kg
A different vehicle wearing the same plate.
580 kg of phantom material per trip — roughly ₹9,000 a run, invoiced against a weighbridge slip that was itself accurate.
How a trip is checked
Bonded at the tare weigh
The guard reads the chassis number off the vehicle itself. It is sealed
into the barcode together with the plate, vendor, driver and tare weight,
encrypted with AES-256-GCM and signed. The sticker is printed
on void-security stock: lifting it destroys it.
Read at the gate, before entry
The scanner asks the guard to type the chassis number they can physically see before it shows what the barcode claims. A guard shown the expected answer first would only ever confirm it — this is the check that actually catches a swapped vehicle.
Weighed, and the net is computed
Net weight is derived from the tare sealed inside the barcode, never typed. A net outside tolerance flags the trip and holds it for a supervisor rather than flowing into a challan.
Closed, and the code dies
The exit scan closes the trip and invalidates the token. It expires four hours after issue in any case, and a third scan is refused outright. Every scan, photograph, GPS fix and supervisor decision stays on the record.
What a gate refuses
Chassis mismatch
The barcode names one vehicle and the guard is standing in front of another.
Barcode reused
A code already scanned in and out, presented again on a later trip.
Expired
Transit took longer than the window allows. Held, not waved through.
Altered or unreadable
A reprinted, edited or torn code fails its signature and is refused.
No sticker
A vehicle arriving without one is photographed and referred to a supervisor.
Weight anomaly
Net more than 10% off the expected range flags before any challan is raised.
Ways in
Gate scanner
For guards, on a phone. Scan, check the chassis, pass or stop, photograph, escalate.
Open →Supervisor console
Issue barcodes at the weighbridge, print stickers, answer holds, read the daily report.
Sign in →Verify a certificate
Material certificates are issued and checked on ScrapAssure. If you are holding one, its check lives there.
Go to ScrapAssure →Vehicle traceability for scrap movements between plants. Every trip carries a single-use encrypted identity from the tare weigh to the closing scan.
Operate