BREAKING DOWN 'Implied Warranty'. Most products you buy do not come with a written warranty. For example, when you go to the supermarket, you assume that the stocked items are fresh and edible. This is especially important when the food is prepackaged and you can't visibly inspect it.REAKING DOWN 'Implied Warranty'. Most products you buy do not come with a written warranty. For example, when you go to the supermarket, you assume that the stocked items are fresh and edible. This is especially important when the food is prepackaged and you can't visibly inspect it.