They can, and some (at least one) do - I guess it'a management choice. At a grocery shop where I usually purchase groceries, on the expiry day, some products w

They can, and some (at least one) do - I guess it'a management choice. At a grocery shop where I usually purchase groceries, on the expiry day, some products will have a 15% (or so) discount. I don't remember seeing this in other shops though, or rarely.