What is ISF (Importer Security Filing)? How to File Correctly

Required Information for ISF Filing

ISF is called "10+2" because it requires importers to submit 10 data elements about the shipment, plus 2 additional pieces from the carrier.

10 Importer/Supplier Data Elements:

1. Manufacturer/Supplier name and address

2. Seller name and address

3. Buyer name and address

4. Ship-to party name and address

5. Container stuffing location

6. Consolidator name and address

7. Importer of Record (IOR) number

8. Consignee number

9. Country of origin

10. HTSUS code (Harmonized Tariff Schedule of the U.S.) for each item

2 Carrier Data Elements:

1. Vessel stow plan

2. Container status messages

Additional Requirements:

• Link ISF to AMS (Automated Manifest System) using the MBL/HBL number and carrier SCAC code.

Key Notes:

• Data must be accurate, updated promptly, and submitted via CBP’s system ≥24 hours before vessel departure.

• Container stuffing location and consolidator details can be updated later but no later than 24 hours before U.S. arrival.

Who is Responsible for ISF Filing?

The Importer of Record (IOR) in the U.S. is legally responsible. However, they may authorize a customs broker, forwarder, or logistics provider to file on their behalf via a Power of Attorney (POA).

In Vietnam, exporters typically coordinate closely with U.S. importers or logistics partners to ensure timely ISF submission, avoiding penalties or cargo holds.