This past Shabbat, I visited a family that has many guests.
When the time came for dessert, they served iced cream.
Since I cannot eat dairy foods, checked the box, to verify that it was pareve.
I could not find a kashruth symbol, even after inspecting the box many times.
I showed the box to the host & hostess,
who also could not find any kashruth symbol.
The iced cream was taken back, and thrown in the garbage.