[updated]: Th3 Serial Number

Two different devices (e.g., a dock and a cable) claim to have the exact same TH3 serial number. Cause: Counterfeiters often copy one legitimate serial number onto thousands of fake units. Solution: Report the duplicate to the original manufacturer. Genuine serial numbers are globally unique. If you scan the barcode and it returns a product image that doesn't match your device, it's a fake.

Never throw away the box for a Thunderbolt 3 device. The serial number is always printed on a white label next to the barcode, often prefixed with "TH3." th3 serial number