When you decide to ship products to Amazon fulfillment centers, please follow these general requirements. Amazon may reject, return or repackage any products that are not adequately packaged or meet the requirements of Amazon product label policy, and you’ll be responsible for any additional charges from Amazon.
Amazon systems are barcode-driven. Each unit you send to a fulfillment center requires a barcode so that it can be tracked throughout the fulfillment process.
Make sure that the label can be scanned using an RF scanner.
If there are multiple barcodes present, make sure to cover those as well. The only scannable barcode should be the Amazon product label.