Cashier service report confidential?  We have weekly statuses with each cashier based on their scores.  It's called holding them accountable.  We use it as a means of recognition and basis for coaching if need be.  In fact, I base the annual review on the cashier service report.
No, I don't share the info with the other cashiers, but it would be a worthless report if we didn't share the info with the cashier, wouldn't it?