Sometimes Whistl will block shipments based on the names of the product within, you may get an error such as:
Whistl error: (400) Message: - Creating shipment has gone wrong: You've sent me an unsuccessful CreateShipmentResponse (error message was: Server encountered an error sending one or more parcels: )
In this product example, the shipment was blocked due to the word "Nuclear":
description: "Airmen of Chernobyl : Aviation and the Chernobyl Nuclear Disaster, 1986, Paperback"
If you think that your products are may be at risk of this, please reach out to your Whistl representative for clarification.
If you encounter any issues, please feel free to contact our support team. You can call us on 0117 403 4313 (UK) / +1 (629) 666-6726 (US) or reach us online here.