Glossary · Ocean imports

Importer Security Filing (ISF)

5 min readUpdated Oct 2026
Quick answer

Importer Security Filing (ISF), also called "10+2", is a U.S. Customs and Border Protection (CBP) requirement for ocean shipments: the importer submits 10 data elements about the cargo and the shipping line adds 2 more. It must be filed at least 24 hours before the cargo is loaded onto a vessel bound for the United States.

Who filesImporter (10 elements) + shipping line (2)
Deadline24 hours before loading on a U.S.-bound vessel
PenaltyFines of up to $5,000 per shipment
1 Gather the 10 elementsSeller, buyer, manufacturer, HTSUS number and the rest, from your suppliers and logistics providers.
On this pageImporter Security Filing (ISF) – Simple Explanation and ExamplesWhat Is Importer Security Filing (ISF)?Importance of ISF ComplianceSteps to File an ISFExamples of ISF FilingImportant Notes and ConsiderationsConclusion and Call to ActionFAQs on Importer Security Filing (ISF)

Importer Security Filing (ISF) – Simple Explanation and Examples

In the complex world of international logistics and customs clearance, understanding specific terms and processes is crucial. One essential term is Importer Security Filing (ISF). This article provides a detailed explanation of ISF, complete with examples and important considerations. If you are new to the field, this guide will offer valuable insights.

What Is Importer Security Filing (ISF)?

Importer Security Filing (ISF), also known as “10+2,” is a U.S. Customs and Border Protection (CBP) requirement designed to enhance security by requiring importers to electronically submit certain data about their cargo before it arrives at a U.S. port. This regulation helps to pre-identify high-risk shipments and ensure the safety and integrity of international supply chains.

ISF Requirements

The ISF consists of 10 elements that the importer must provide:

  1. SellerName and address of the seller.
  2. BuyerName and address of the buyer.
  3. Importer of Record NumberTax ID, EIN, SSN, or Manufacturer ID.
  4. Consignee Number(s)Identifying numbers of the consignees.
  5. Manufacturer (or Supplier)Name and address of the manufacturer or supplier.
  6. Ship to PartyName and address of the location the goods are being shipped to.
  7. Country of OriginCountry where the goods were manufactured.
  8. Commodity Harmonized Tariff Schedule Number (HTSUS)The HTSUS number of the goods being shipped.
  9. Container Stuffing LocationLocation where the container was stuffed.
  10. Consolidator (Stuffer)Name and address of the party who stuffed the container.

In addition to these 10 elements, the shipping line must provide 2 more elements, making it the “10+2” rule:

  1. Vessel Stow PlanDescribes the physical location of the cargo on the vessel.
  2. Container Status Messages (CSM)Details the status of individual containers, including changes in status and location.

Importance of ISF Compliance

Security Enhancements

The primary purpose of ISF is to boost U.S. national security by identifying and mitigating potential threats posed by imported goods. By requiring detailed information in advance, CBP can better target and screen shipments, thus protecting borders and supply chains from security threats.

Avoiding Penalties

Non-compliance with ISF requirements can lead to significant penalties, including fines of up to $5,000 per shipment. Additionally, non-compliant shipments might be subjected to customs holds, causing costly delays and disruptions in the supply chain.

Steps to File an ISF

Gathering Required Information

Before filing an ISF, an importer must gather all the required information. This involves coordinating with various parties, including suppliers, manufacturers, and logistics providers, ensuring that all essential data is accurate and complete.

Filing the ISF (importer security filing)

Importers can file the ISF electronically through the Automated Broker Interface (ABI) system or employ a customs broker to manage the filing on their behalf.

  1. Access the ABI SystemImporters can use CBP’s ABI system to submit the filing directly.
  2. Utilize a Customs BrokerPartnering with a qualified customs broker can simplify the process and ensure timely and compliant submissions.
Shipping by ocean to the US?Your ISF (10+2) is due 24 hours before loading. File it online, from $30.
File your ISF

Examples of ISF Filing

Example 1: Electronics Import

An importer in the U.S. is bringing in a shipment of electronic goods from China. Here is an outline of the ISF filing process:

  • SellerABC Electronics Ltd., Shanghai, China
  • BuyerXYZ Retail Inc., New York, USA
  • Importer of Record NumberXYZ Retail’s EIN
  • Consignee Number(s)XYZ Retail’s Tax ID
  • Manufacturer (or Supplier)ABC Electronics Ltd., Shanghai, China
  • Ship to PartyXYZ Retail Inc.’s distribution center in New Jersey, USA
  • Country of OriginChina
  • Commodity HTSUS Number8528.72.64 (for LCD televisions)
  • Container Stuffing LocationShanghai, China
  • Consolidator (Stuffer)ABC Logistics, Shanghai, China

The shipping line would then provide:

  1. Vessel Stow Plan
  2. Container Status Messages (CSM)

Example 2: Apparel Import

A fashion retailer in the U.S. imports garments from India. The ISF filing would include:

  • SellerFashion Fabrics Ltd., Mumbai, India
  • BuyerTrendy Wear Inc., Los Angeles, USA
  • Importer of Record NumberTrendy Wear’s EIN
  • Consignee Number(s)Trendy Wear’s Tax ID
  • Manufacturer (or Supplier)Fashion Fabrics Ltd., Mumbai, India
  • Ship to PartyTrendy Wear Inc.’s warehouse in California, USA
  • Country of OriginIndia
  • Commodity HTSUS Number6204.62.40 (for women’s cotton trousers)
  • Container Stuffing LocationMumbai, India
  • Consolidator (Stuffer)Indian Logistics Ltd., Mumbai, India

Important Notes and Considerations

  • Timeliness: The ISF must be submitted at least 24 hours before the cargo is loaded onto a vessel bound for the United States.
  • Accuracy: Ensure the accuracy of each data element, as errors can lead to delays, inspections, and penalties.
  • Coordination: Effective coordination among all stakeholders (suppliers, manufacturers, logistics providers) is essential to gather and submit accurate information.
  • Updates: If any ISF information changes after the filing, it must be updated promptly. Updates are permitted until the goods arrive at a U.S. port.

Conclusion and Call to Action

The Importer Security Filing (ISF) is a vital component of modern customs clearance and logistics procedures. By adhering to ISF requirements, importers can help protect national security, avoid costly fines, and ensure a smooth import process.

To navigate the complexities of ISF filing and customs clearance, consider partnering with experts who can provide the necessary guidance and support. For professional assistance with your import/export needs, contact eezyimport today, and let our expertise help simplify your customs-related processes.

FAQs on Importer Security Filing (ISF)

1. What is the main purpose of the Importer Security Filing (ISF)?

The main purpose of the Importer Security Filing (ISF), also known as “10+2,” is to enhance the security of the U.S. by requiring detailed data about cargo before it arrives at a U.S. port. This allows U.S. Customs and Border Protection (CBP) to identify high-risk shipments and protect the integrity of international supply chains.

2. What information is required for an ISF filing?

For an ISF filing, importers need to provide the following ten elements:

  1. Seller
  2. Buyer
  3. Importer of Record Number
  4. Consignee Number(s)
  5. Manufacturer (or Supplier)
  6. Ship to Party
  7. Country of Origin
  8. Commodity Harmonized Tariff Schedule Number (HTSUS)
  9. Container Stuffing Location
  10. Consolidator (Stuffer)

Additionally, the shipping line must provide two more elements:

  • Vessel Stow Plan
  • Container Status Messages (CSM)

3. What are the penalties for not complying with ISF requirements?

Failure to comply with ISF requirements can result in significant penalties, including fines of up to $5,000 per shipment. Non-compliance can also cause customs holds, leading to costly delays and disruptions in the supply chain. It is crucial to ensure timely and accurate submission of ISF data to avoid these issues.

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