US Customs Clearance: ISF, POA, IOR Checklist — The 2026 Guide for Amazon FBA Sellers

You’ve chosen the right Incoterm (DDP, as Amazon FBA mandates) and your supplier is ready to ship. But between the factory in Shenzhen and the Amazon fulfillment center in Ontario, California, sits a black box that rejects more FBA shipments than port congestion ever will: US Customs and Border Protection (CBP).

Three acronyms govern whether your container glides through or gets stuck in “customs jail”: IOR​ (who is legally responsible), POA​ (who is authorized to act), and ISF​ (the data CBP demands before your cargo even touches the ship).

In 2026, the stakes are higher than ever. With the suspension of de minimis treatment for Chinese-origin goods, every shipment from China — regardless of value — now requires a formal entry, duty payment, and full documentation. A single missing ISF element can trigger a $5,000 penalty​ or a “Do Not Load” hold that leaves your cargo sitting at the pier in Yantian while your Amazon listing goes out of stock.

This guide opens the black box. We’ll walk through exactly who does what, which CBP forms you need, the 24-hour ISF deadline, and a phase-by-phase checklist to keep your FBA inventory moving.

The Three Pillars of US Customs Clearance

Before any document is filed, you need three foundational elements in place. Think of them as the “license to import.”

1. IOR (Importer of Record): Who Is Legally on the Hook?

The Importer of Record​ is the entity legally responsible for the shipment: they must ensure the goods comply with all US laws, pay all duties, taxes, and fees, and maintain records for 5 years​ .

How to get an IOR number:

• Obtain an EIN (Employer Identification Number)​ from the IRS (foreign entities can apply for an EIN as a non-US person)
• File CBP Form 5106​ (Create/Update Importer Identity) to register the EIN with CBP
• If you have no EIN and cannot get one, CBP can assign a CBP-assigned importer number​ (typically via Form 5106)

⚠️ Amazon FBA rule:​ Amazon will not​ act as IOR for any FBA shipment . As we covered in DDP vs. DAP for Amazon FBA, this means your DDP freight forwarder’s US entity must serve as the IOR​ — they use their EIN, bond, and broker relationships to clear your cargo, then bill you via the all-in DDP rate.

The IOR is liable for:

• Paying Section 301 tariffs, MPF, HMF, and any antidumping/countervailing duties
• Accuracy of HTS classification, valuation, and country of origin
• Recordkeeping for 5 years (19 CFR 163)

2. POA (Power of Attorney): Authorizing Your Customs Broker

A licensed US customs broker cannot file an entry on your behalf without legal authority. That authority comes from a Power of Attorney​ — specifically CBP Form 5291​ (Power of Attorney for a Customs Broker) .

Key facts about the POA:

• Who signs:​ The IOR (the importer). For a corporation, an authorized officer (President, VP, CEO, etc.) must sign; a corporate resolution may be required
• What it grants:​ Authority to transact customs business — file entry, pay duties, obtain refunds, sign documents, and receive CBP notices
• Types:​ General POA​ (covers all shipments, used by regular importers) vs. Limited/One-time POA​ (covers a single shipment)
• Validity:​ Remains valid until revoked in writing

💡 Pro tip:​ Under the DDP model for Amazon FBA, the flow is: Amazon Seller (beneficial owner) → DDP Forwarder’s US Company (IOR) → Customs Broker (via CBP Form 5291 POA). The forwarder’s IOR signs the POA authorizing the broker. You, as the seller, never sign a POA with the broker directly — but you must provide accurate shipment data to the forwarder so their IOR can file correctly.

3. Customs Bond: The Financial Guarantee

CBP requires a bond to guarantee payment of duties, taxes, and penalties. There are two main types:

Bond Type	Coverage	Cost	Best For
Continuous Bond (CB)​	All imports for 12 months; covers entries, ISF, and other obligations	$400–$600/year​ for a $50,000 minimum bond (premium is a % of bond amount)	Regular importers (multiple shipments/year)
Single Transaction Bond (STB)​	One shipment only	$100–$300+ per shipment​ (based on entered value + duties)	One-time or occasional shippers

Bond amount rules:

• Continuous Bond: Minimum $50,000, or 10% of duties/taxes/fees paid in the prior 12 months (whichever is greater)
• ISF requires a bond​ — either a Continuous Bond that includes ISF coverage, or an ISF-specific Single Transaction Bond

⚠️ Warning:​ A “Continuous Bond” does not​ automatically cover ISF unless it is written to include ISF liability. Confirm with your surety that your bond covers both entry and ISF​ — otherwise you need a separate ISF bond.

ISF (Importer Security Filing): The “10+2” Rule

ISF, often called “10+2,”​ is a CBP regulation (19 CFR 149) requiring ocean cargo data to be transmitted before​ the cargo is loaded onto a vessel destined for the US . It applies to all commercial ocean shipments, with no minimum value threshold.

The 10 Importer Elements

These must be filed by the ISF Agent​ (usually your customs broker or forwarder) using the IOR’s data:

1. Seller​ — Name and address of the party who sold the goods
2. Buyer​ — Name and address of the purchaser
3. Importer of Record number​ — IOR’s EIN or CBP-assigned number
4. Consignee number(s)​ — Identification number of the ultimate consignee
5. Manufacturer (or supplier)​ — Name and address of the entity that last manufactured/assembled the goods
6. Ship to party​ — Name and address of the first delivery destination (for FBA: the Amazon fulfillment center address)
7. Country of origin​ — Where the goods were manufactured (e.g., CN)
8. HTSUS number​ — HTS code to at least 6 digits (10 digits recommended for accuracy)
9. Container stuffing location​ — Physical address where the container was loaded
10. Consolidator (stuffer)​ — Name and address of the party who stuffed the container

The 2 Carrier Elements

The carrier is responsible for:

• Vessel stow plan​ — Filed within 48 hours after the vessel departs​ the last foreign port
• Container status messages​ — Filed as events occur (e.g., container loaded, discharged, or status changes), giving CBP real-time visibility

The 24-Hour Rule & Penalties

⚠️ Deadline:​ ISF must be filed no later than 24 hours before the cargo is laden (loaded) aboard the vessel​ at the foreign port — not​ 24 hours before the ship sails, and not​ before arrival in the US.

Consequences of late, inaccurate, or missing ISF:

• “Do Not Load” (DNL) message:​ CBP instructs the foreign port not to load the container. Your cargo misses the vessel entirely.
• Liquidated damages:​ $5,000 per violation.​ A single shipment can accrue multiple violations (late + incorrect data), capped at $10,000 per shipment.
• Increased exams:​ Even after release, a history of bad ISF data triggers more CBP exams.

💡 Best practice:​ Provide ISF data to your forwarder at least 72 hours (3 days) before the CY cut-off / vessel loading. Most forwarders request it 3–5 days in advance. Last-minute ISF = guaranteed stress and rollover risk.

The 2026 Reality: De Minimis Elimination Changes Everything for Small Sellers

Historically, shipments valued under $800​ could enter the US duty-free under Section 321 de minimis​ with minimal paperwork. That era ended for Chinese-origin goods.

What changed:

• The US suspended de minimis treatment for goods from China​ (effective May 2025, continuing through 2026)
• All shipments from China — regardless of value — now require a formal entry​ with full documentation, HTS classification, and duty payment
• Ocean LCL shipments from China always required ISF​ (no value threshold), but now they also trigger full duty liability (Section 301 tariffs, MPF, HMF)

What this means for Amazon FBA sellers:

• Your 2 CBM LCL test shipment is no longer “too small to matter” — it needs ISF, a formal entry, and duty payment
• Accurate HTS codes​ and country of origin​ are critical; vague descriptions trigger CBP exams
• Under DDP, your forwarder’s IOR pays these duties — but you reimburse them​ via the all-in quote. Under-quoting duties leads to disputes or forwarder losses

The Complete US Customs Clearance Checklist

Here is the end-to-end sequence, from setup to post-entry recordkeeping.

🔵 Phase 1: Before You Book (Set Up Your Import Identity)

✅ Obtain IOR number:​ Get an EIN from the IRS, then file CBP Form 5106​ to register with CBP

✅ Secure a Customs Bond:​ Purchase a Continuous Bond​ (if shipping regularly) that explicitly covers both entry and ISF, or arrange an STB + ISF bond per shipment

✅ Sign CBP Form 5291 (POA):​ The IOR signs a General POA authorizing a licensed customs broker to act

✅ Verify Amazon FBA compliance:​ Confirm your forwarder will act as IOR under DDP (Amazon will not); get written confirmation of their IOR credentials

✅ Prepare product data:​ Final HTS codes, country of origin, manufacturer name/address, and commercial invoice template

🟡 Phase 2: Booking & ISF Filing

✅ Provide 10 ISF elements to forwarder​ — at least 72 hours before CY cut-off

✅ Forwarder files ISF via ABI/ACE​ — 24 hours before cargo is laden

✅ Confirm “Do Not Load” is clear​ — Verify with forwarder that CBP has not issued a DNL hold

✅ Carrier files vessel stow plan​ (within 48h of departure) and container status messages

✅ Ocean transit begins​ — Track vessel via MarineTraffic or carrier portal

🟢 Phase 3: Arrival & Entry

✅ ISF already on file​ (from Phase 2)

✅ File entry:​ Broker submits CBP Form 3461​ (Entry/Immediate Delivery) upon arrival

✅ CBP review & release:​ Cargo is released, or flagged for exam (X-ray, tail gate, etc.)

✅ Pay estimated duties:​ Under DDP, forwarder’s IOR pays; under your own IOR, you pay via ACH or Periodic Monthly Statement (PMS)

✅ Drayage to FBA:​ Truck moves container to Amazon FC (e.g., ONT8) with FBA appointment locked

🔴 Phase 4: Post-Entry (Within 10 Working Days)

✅ File Entry Summary:​ Broker submits CBP Form 7501​ within 10 working days​ of cargo release, finalizing duty calculation

✅ Duty payment finalized:​ MPF (0.3464% of value, min $32.71 / max $634.62 in 2026), HMF (0.125%), Section 301 duties

✅ Post-entry amendments:​ Corrections allowed within 300 days​ of entry (before liquidation)

✅ Recordkeeping:​ IOR must retain all entry documents, invoices, and ISF records for 5 years

✅ Liquidation:​ CBP finalizes the entry (typically within 1 year); any refunds or bills are issued

Amazon FBA Specific: Mapping the Data Correctly

FBA shipments have unique data requirements that trip up inexperienced forwarders:

ISF Element	FBA Shipment Value	Common Mistake
Ship to party​	Amazon fulfillment center address (e.g., ONT8, 24300 Nandina Ave, Moreno Valley, CA 92551)	Using the seller’s home address instead of the actual FC
Ultimate consignee​	Typically Amazon (as receiving party) — but not​ the IOR	Listing Amazon as IOR (Amazon prohibits this)
Importer of record​	Your DDP forwarder’s US entity​ (with EIN)	Listing the overseas seller as IOR without a US EIN
Manufacturer​	Actual factory name/address (not the trading company)	Listing the supplier/trading company instead of the real manufacturer
HTSUS number​	10-digit HTS code for the specific product	Using a generic 6-digit code; triggers undervaluation exams

⚠️ Critical:​ If your forwarder puts Amazon​ as the IOR, or leaves the IOR field blank, the ISF will be rejected and the shipment will not load. Confirm the IOR field shows your forwarder’s EIN, and the ship-to field shows the Amazon FC address.

The 5 Deadly Clearance Mistakes (and How to Avoid Them)

❌ Mistake 1: Missing the 24-hour ISF deadline

✅ Fix: Treat the CY cut-off as the real deadline. Give your forwarder ISF data 3–5 days before​ the cut-off, not 24 hours.

❌ Mistake 2: Wrong or vague HTS code

✅ Fix: Use the full 10-digit HTSUS​ code. “Electronics accessory” gets flagged; “Bluetooth earbuds, HS 8517.62.0090” clears cleanly. Verify against the USITC HTS.

❌ Mistake 3: Manufacturer vs. Supplier confusion

✅ Fix: ISF requires the actual manufacturer​ (factory), not the trading company or supplier you bought from. Ask your supplier for the factory’s name and address.

❌ Mistake 4: Bond doesn’t cover ISF

✅ Fix: Explicitly ask your surety: “Does my Continuous Bond cover ISF liability?” If not, add an ISF rider or buy a separate ISF bond.

❌ Mistake 5: Assuming Amazon handles import duties

✅ Fix: Amazon will not​ pay duties and will reject​ any shipment with charges due. Only ship DDP with a forwarder acting as IOR. (See DDP vs. DAP for Amazon FBA.)

Required Documents: The Full Binder

Keep these on file for every shipment (and retain 5 years):

Document	Purpose
Commercial Invoice​	Shows seller, buyer, description, value, Incoterm, country of origin
Packing List​	Carton count, dimensions, weight, CBM
Master Bill of Lading (MBL)​	Ocean carrier contract of carriage
House Bill of Lading (HBL)​	Forwarder’s contract (for LCL/FCL via forwarder)
Arrival Notice​	Issued by carrier; triggers entry filing
CBP Form 3461​	Entry / Immediate Delivery
CBP Form 7501​	Entry Summary (duty calculation & payment)
CBP Form 5106​	Importer ID input record (IOR registration)
CBP Form 5291​	Power of Attorney (broker authorization)
ISF confirmation​	Proof of 10+2 filing (with timestamp)
Customs Bond​	Continuous or Single Transaction Bond documentation
Other agency forms​	FDA, FCC, DOT, USDA, etc. (if regulated product)

Bottom Line: Clearance Is a Process, Not a Form

US customs clearance fails for one reason: someone treated it as a paperwork exercise instead of a compliance process.​ ISF, POA, and IOR are not three separate tasks — they are an interconnected chain:

• IOR​ establishes who is responsible
• Bond​ guarantees payment of duties and penalties
• POA​ authorizes the broker to act
• ISF​ delivers the data CBP needs to assess risk before loading

Break any link, and your cargo stops. In 2026 — with de minimis gone, CBP auditing e-commerce aggressively, and Amazon rejecting non-DDP shipments — the cost of a broken link isn’t just a $5,000 ISF penalty. It’s missed Q4 sales, a stockout, and damaged account health.

The solution is working with a forwarder who owns the entire chain: a US-based IOR with a valid EIN and Continuous Bond, an ISF filing process that starts 72 hours before cut-off, and a licensed customs broker operating under a proper CBP Form 5291 POA.

Shipping from China to Amazon FBA and need a bulletproof clearance process?

Our DDP program includes everything in this checklist: US-IOR registration (EIN + CBP Form 5106), Continuous Bond with explicit ISF coverage, CBP Form 5291 POA with a licensed broker, ISF filed 72 hours before CY cut-off, accurate HTS classification, CBP Form 7501 entry summaries, and 5-year recordkeeping. Contact us to get a compliant DDP quote — and never let customs jail your FBA inventory again.