I don't know! I've seen many posts on this forum stating they found a hen sitting on eggs, or wasn't getting as many eggs, and ends up there was a nest full hidden. I was pet sitting for this family, and they have LOTS of chickens. Too many for me to count. They have several bantams that don't go into the chicken run at all. They are true free range, as in never in a coop, or fenced in! I found 6 nests of eggs in the barn, totaling over 100 eggs!!! I left them, as who knows how long they had been there. The owner threw them out after a few weeks, when only about 20 of them hatched. EEKS! LOL!
Growing up, my parents raised their chickens kinda like I do. I have a coop, and a run, but I turn them out into the yard everyday. I wait until the hottest part of the day so they can find a cooler spot to be in, and they stay out until dust, when they put themselves to bed. I haven't gotten my first egg yet though. I'm hoping they'll lay before I let them out, or at least run back into the coop to lay!
There is a poster that goes by Ruth on here. She has all hers out free ranging, and most come back to lay their eggs. So I guess it depends on what they are use to, and what they know.
I believe we will have to be diligent on counting the amount of eggs versus hens when ours start laying. Just to be sure one hasn't gone broody, or they haven't found a better nesting spot than the metal nesting boxes I have in the coop!