Food held, cooled, cooked, or reheated outside safe temperatures, letting dangerous bacteria multiply.
Dish machine or sinks not set up or working properly, or missing sanitizer test kit and gauges.
Surfaces that touch food — cutting boards, ice bins, dish racks — soiled or not sanitized.
Scoops and other in-use utensils stored improperly (e.g. handle down in the food).
The establishment's license expired, not obtained, or not properly displayed.