Yes, there are cases where the student will get a refund, through FA, even without a loan.
Right now the Florida Benacquisto scholarship covers full tuition, fees, $600 for books, room and board, so almost all students get at least the $600 for books paid to them, and those living off campus get the room and board. But if a student also had a Florida Prepaid account and elects to use that, that would cover tuition and fees, and maybe room and board (the plans differ). The Benacquisto money would then be paid to the student, about $12k per semester. The student would then have to figure out what is taxable. There can also be other scholarships from the school or from outside sources that are stackable. Pretty big check from FA.
There can also be extra money from Pell or other grants given to students. If the student has another scholarship that cover billed costs from the school, the Pell can be refunded to the student.