As I finish the kitchen inspection, I always take a picture of the stove with everything off. I’ve never left on one but have heard of it being done. It’s just a safety guard. When I check my pictures, it says, yes you did turn the stove ad oven off. I know some inspectors leave there keys on the stove.
I’d actually created a template item that needs to be answered if the range was turned off. And I take pictures of the range in operation for proof that it was tested.
That’s a good idea.
And this is another: http://www.nachi.org/three-photos-inspection-report.htm