An online check cannot be unconfirmed (you should use the Reverse & Confirm pushbutton to perform this function). When running an unconfirm for off-cycles, there is specific code in the process that checks the pay sheet source for pages included in the run control. A PAY_SHEET_SRC of 'O' (online check) or 'L' (online final check) will be bypassed and a message will be displayed in the logfile that 'Un-Confirmation skipped for Company'.
In addition, reversals of online checks or online final checks cannot be unconfirmed either. The reversal process will create the reversal with the same PAY_SHEET_SRC as the original check being reversed, and this causes the reversal to be bypassed during the unconfirm same as the online check.
In addition, reversals of online checks or online final checks cannot be unconfirmed either. The reversal process will create the reversal with the same PAY_SHEET_SRC as the original check being reversed, and this causes the reversal to be bypassed during the unconfirm same as the online check.