When a field is set to "NULL", it causes the notification condition validation for field.isEmpty() to failDescriptionWhen a field is set to "NULL", it causes the notification condition validation for field.isEmpty() to fail Steps to Reproduce Create a Notification in sc_req_item where the condition Assigned To is empty,Create a Business Rule on sc_req_item that sets AssignedTo="NULL" on before The notification contains a condition where Assigned_to is empty Open a Request itemSet assigned_to Fred Luddy and Save The Business Rule sets the assigned_to to NULL which causes the Problem No Notification is sent WorkaroundRemove assigned_to from the Notification condition and add the following on the advanced condition: answer=current.assigned_to?false:true;Related Problem: PRB1296816