Make sure each product has its own unique barcode label.If you have 2 boxes with 30 products each, label each product individually.For variations, label each with the right barcode (FNSKU or UPC).If your products don’t need any prep, select "No Prep Needed."If you’re using Amazon’s barcodes, choose “Stickerless, Commingled” or "Stickered."This way, your FBA shipment should go smoothly. If you’re unsure, reach out to Amazon Seller Support for help
Scroll down to FBA product barcode preference and click Edit.
Select Amazon barcode, then click Update.
This will be the default for all future shipments, unless you change it back. To straighten out the shipment you are working on, you will need to re-create it. There is no way to edit it. You can find additional information in the following Article:
you’ve selected the Manufacture barcode option for labeling, which may not be suitable for your brand-registered products. To ensure correct labeling, you should choose the Amazon barcode option, which is typically required for FBA shipments.