Amazon removed product barcodes from the API that Shiptheory uses to download order and product information. That means, if you want to include product barcodes on your integrated labels, you will need to add barcodes to your products in Shiptheory via one of the following methods:
1. Give us a CSV of SKU + product barcode and we can import the Amazon product barcodes into your Shiptheory account.
3. If your Amazon products exist in other channels that Shiptheory is connected to, with the same SKUs, Shiptheory will download the barcodes from those channels.
Should you have any further questions about this or anything else, please get in contact with our support team.