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Enhanced error messaging for shipment and delivery endpoints

Placed on:10 March 2026

Good news! On 18th of March, we will update the error message returned by the Create Shipment, Get Delivery Options and Create Shipping Label endpoints when a request contains order items that do not belong to the same order.

Old message (example)
“Request contains order item id(s) that do not belong to the same order.”

To provide clearer guidance, we have improved this message.

New message (example)
“Your request has order item id(s) that are not in the same order. Please change the request into separate request(s) with order item id(s) 2182285438, 2182285439. And with order item id 2182285440”

*Note: This message could look a bit different with more or fewer order items.