You can view all Validation Messages include Passed, Failed and Unable to Complete.  See below for details.

View Validation Notes

From the Bill, you can view all the Validation.  The default is to show the Passed and Failed, but you can add in the Unable to Complete ones.

• Right click on the Bill  > View Validation Notes
• Click on the downward arrow on the Column Header Bar > Filter

• Tick Show UNABLE TO COMPLETE results

• Click OK
• All the Validation will now show

View the Printed Bill

• Right click on the Bill  > View Printed Bill