If a user's NVOCC AMS bill receive rejection "299 INVALID B/L IN B04/N9" means that the corresponding carrier has filed their AMS manifest with wrong bill type (Regular Bill). Regular Bill type by the carrier indicates to CBP that there is no freight forwarder involved in this shipment so CBP is not expecting any NVOCC AMS BL submission hence, rejecting the BL. To resolve, inform the carrier to amend their bill type to MVOCC or MVOCC (FROB) BL. Once the carrier submits the change. Freight forwarder user can then send the NVOCC AMS BL as ADD.