Prepping expiration-dated products. Expiration-dated products must be fully enclosed and sealed in packaging suitable for shipping. Expiration-dated products that require additional preparation, such as poly-bagging or bubble wrap, must have labels with expiration dates applied to the outside of the product prep or packaging to ensure that the expiration date is accessible for Amazon …
https://sellercentral.amazon.com/gp/help/external/G201003420?language=en_US

