> By default, we use the manufacturer barcode to track eligible inventory throughout the fulfillment process, unless you change your barcode setting or your product is not eligible. When more than one seller has inventory with the same manufacturer barcode, we may fulfill orders with the inventory that’s closest to the buyer, to facilitate faster delivery.
> If your product isn’t eligible for virtual tracking with the manufacturer barcode, an Amazon barcode is required. You may be able to get an exemption to use the manufacturer barcode by enrolling your ASIN in Amazon Brand Registry. To learn more about virtual tracking and see product eligibility requirements, go to,Using manufacturer barcodes with FBA virtual tracking.
To your point, maybe it depends on the product?
https://sellercentral.amazon.com/help/hub/reference/external...
> By default, we use the manufacturer barcode to track eligible inventory throughout the fulfillment process, unless you change your barcode setting or your product is not eligible. When more than one seller has inventory with the same manufacturer barcode, we may fulfill orders with the inventory that’s closest to the buyer, to facilitate faster delivery.
> If your product isn’t eligible for virtual tracking with the manufacturer barcode, an Amazon barcode is required. You may be able to get an exemption to use the manufacturer barcode by enrolling your ASIN in Amazon Brand Registry. To learn more about virtual tracking and see product eligibility requirements, go to,Using manufacturer barcodes with FBA virtual tracking.