Checkpoint
Check a shipment
Scan the QR code on the parcel. The first match on the registry is valid. Scanning that same code again is a duplicate shipment.
Shipment check
Invalid
This tracking number is not on the shipment registry.
Check anotherScan QR code
Camera is off.
The camera view appears here.
The QR code should contain the tracking number itself, with no extra web address. A sample image is samples/sample-qr.png and reads 1Z999AA10123456784.