Like many other employers, you’ve got a handbook policy that says that non-exempt employees cannot work overtime unless they obtain prior approval from a manager or supervisor. If, without prior approval from a manager or supervisor, a non-exempt employee works overtime and reports those hours to you, the Fair Labor Standards Act requires that you pay that employee overtime. (However, you can discipline that employee for violating your work rules).
But what happens if that same employee works overtime without prior permission and fails to report those hours. Must you still pay that employee overtime?