Even “ships from and sold by amazon.com” products are comingled with potentially conterfeit products, unless a brand pays extra money for them not to be. No way for the end user to know if they’re getting comingled product.
Or the FBA label service [2] can apply the stickers for you, at 0.15/item
[1] https://services.amazon.co.uk/services/fulfilment-by-amazon/... [2] https://sellercentral.amazon.co.uk/gp/help/external/G2004837...