Hello,
Yes, BUT when your website received a notification from Shipstation, you have only this :
https://www.yourstore.com/shipstationxml.php?action=shipnotify&order_number=ABC123&carrier=USPS&service=&tracking_number=9511343223432432432
In this notification there isn't the
<OrderID> given previously when the
order is created on Shipstation servers AND as I tell you HikaShop
required the order_id, that's why we had to switch in order to get the order id when ShipStation notify your HikaShop.
Hope this is more clear.
Regards