How do I update shipment status for my own transport? (if it's in transport, in delivery or it's delivered). I don't have possibility to use DHL or UPS service.
You can use to CompleteSale call of Trading API to set the item's shipment tracking information, to leave feedback for the buyer or to change the paid status of the item. You can also mark the order or order line item as shipped from this call.
Please go through the link given below to know more about the call.
eBay Developer Support
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