If an ISF is not filed, will the carrier receive a Do Not Load message? Should the carrier refrain from loading the cargo if the ISF is not filed at origin?

If an ISF is not filed, will the carrier receive a Do Not Load message? Should the carrier refrain from loading the cargo if the ISF is not filed at origin?

Per CBP, carriers are not liable for ISF filing so they are not exposed to liquidated damages if they load a non-compliant cargo as that remains the ISF Importer of Record’s responsibility. It would be up to each carrier to require proof of an ISF before they load cargo.