I received rejection 'Invalid Bonded Carrier ID'. What does it mean?

I received rejection 'Invalid Bonded Carrier ID'. What does it mean?

Reason:
The client is filing an in-bond shipment using INBOND as the shipment type.
Resolution:
Verify with the carrier if they are a BONDED CARRIER or if the EIN or ID # given is correct.

NOTE: Only Bonded Carriers are authorized for in-bond transactions. If the carrier is not bonded, they can look for a bonded carrier to ask for their authorization. Then they should use the Customs Assigned Number of the bonded carrier to transmit the in-bond shipment.