Casey's.
On the box lid there's a tear-off rectangle part.
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When my sister was here she ordered a million pizzas. She's a gluttonous fatass and can sit there and pig out on pizza every single day, making gobbling sounds like when a starving bulldog is trying to eat table scraps and breathe at the same time. They don't have Casey's where she lives.
I noticed that printed on the boxes when I was carrying them out back to burn them. So I tore them off. (and I'd already burned a few before I noticed it)
After she left there were 15 of them and I forgot about them until yesterday.
Free pizza though, I just had to go get it.