Can I suspend shipment by item instead of receiptId? No, it is only by receiptId that you can suspend shipments or use the Process Already Shipped API. Related articles '[INTERNAL_SERVER_ERROR] The cancellation/return quantity doesn't match cancelCount' occurred. An error message "Can not change the delivery status. Please check the order history" is exposed. Cannot find return info in purchase order list. Is a test account or test environment provided for API? When issuing an OpenAPI Key, the issue button is disabled and the API Key cannot be issued.