According to the documentation, label message 1 should appear on customs invoice forms. If we add [Order #] to label message 1, it does not print on the commercial invoice.
How do we enter it so it will be printed?
This also does not work: https://help.shipstation.com/hc/en-us/articles/360025856172-UPS
This is a major bug because the commercial invoice is submitted electronically without the Invoice # or PO#
What is the solution?
Below are 2 screenshots taken from the ShipStation documentation, here
Neither works for UPS commercial invoice.
These instructions work: https://help.shipstation.com/hc/en-us/articles/360025856172-UPS
Our mistake was adding a space before pipe.
Even so, it would be very useful if this worked as discussed so it doesn't have to be entered manually for every order: https://help.shipstation.com/hc/en-us/articles/360025869972-Print-Customs-Forms#print-customs-forms-...