Amazon Seller Briefing: September 14, 2026

US Customs and Border Protection begins voiding Importer of Record numbers on September 18, 2026 where CBP Form 5106 data is inaccurate — broker addresses, P.O. boxes and third-party emails now fail, and a voided number blocks entry until reestablished. Amazon separately requires manufacturer-packaged bundles from January 11, 2027.

Published September 14, 2026 · Seller Signal daily briefing

Good morning, sellers! Welcome to September 14, 2026's edition. Today: CBP can void your importer number on Friday over a form your broker filled in, Amazon stops accepting seller-assembled bundles, and China-Europe air freight got $0.88 per kilogram cheaper for a bad reason. Let's dive in…

Data gathered at 6:05 AM ET, September 14, 2026.

1. Top Story of the Day

CBP starts voiding importer numbers September 18 over Form 5106 data most sellers never see

What happened: From September 18, 2026, US Customs and Border Protection may immediately void an Importer of Record number when the underlying CBP Form 5106 data is inaccurate or incomplete. A voided IOR number cannot enter merchandise into the US until reestablished. CBP published the notice in the Federal Register on August 19, 2026, document 2026-16911, implementing Executive Order 14411, "Strengthening Customs Enforcement," signed June 3, 2026, and says it is reviewing every IOR number on file.

At issue are the physical address, email, phone and identification number — EIN, SSN or CBP-assigned. The physical address must be the importer's actual place of business: not a registered agent, a customs broker or forwarder, a P.O. box, a business service center, or an address "belonging to another person or entity."

Why it matters: Form 5106 is filed once, usually by the broker at onboarding, and never looked at again. The fields CBP is enforcing are exactly the ones a broker fills with its own details — its address, its inbox, its phone. The notice targets shell entities and nominee importers; the sellers caught are those who never saw the form.

Expert take: The trap is the notification channel. CBP sends written notice of the voiding, with reestablishment instructions, to the email on the Form 5106 — if that is the broker's address, the same defect that triggers the voiding, you learn about it when a container stops. No reestablishment turnaround has been published. A 30-minute audit against an unbounded downside, two days after the September 16 FBA inbound deadline for Prime Big Deal Days.

Action items:

Pull your Form 5106 and read the address line. A registered agent, broker, forwarder, P.O. box or mail drop all fail the standard now.
Confirm the email and phone on file are yours. That inbox is where the voiding notice goes, and it is the only warning you get.
Instruct your broker in writing to correct any field it filled with its own details — CBP has reminded brokers not to transmit data they know or should know is unverified.

Sources: Clark Hill; Federal Register.

2. Amazon Policy & Program Updates

Catalog & Listings

Amazon is changing its product bundling policy effective January 11, 2027. Most physical bundles listed under a single ASIN must be packaged by the original manufacturer or brand rather than assembled by the seller. Noncompliant bundles will be deactivated after that date and generate listing violations in Account Health.

Three routes stay open. Authorized repackaging survives with a brand-owner letter of authorization for the combination, uploadable to the Account Health dashboard. Gifting browse nodes and camera product types are exempt outright. And Virtual Bundles stays open to brand owners and authorized resellers with no packaging requirement at all — the cheapest answer for own-brand bundles.

The update also widens what may be bundled — Books, Music, Video, DVD and Video Game, plus pairings with a generic secondary product, a service plan or a gift card. The deadline sits after peak, so the live decision is whether to buy components for a Q1 bundle you may not be able to list. (Amazon Seller Forums)

2A. False Alarms & Noise Filter

Debunked — "A court just freed Perplexity's AI shopping agent to buy on Amazon."

What we actually know: The holding is real and it is six weeks old. The Ninth Circuit decided Amazon.com Services, LLC v. Perplexity AI, Inc., No. 26-1444, on August 4, 2026, vacating the March 9, 2026 preliminary injunction and remanding. The panel found Amazon unlikely to succeed under the Computer Fraud and Abuse Act: Perplexity did not use a tool to "access" Amazon's computers — "it was the user who accessed Amazon's computers, with the help of Perplexity's AI agent." Amazon's August 18 petition for rehearing en banc was denied, with no judge requesting a vote. The panel did not rule all user-directed agents lawful, and Amazon keeps its terms of service and technical blocking. (Ninth Circuit opinion; en banc denial per Courthouse News)

3. International & Cross-Border

The China-Europe air lane got cheaper because the freight left

Setup: Air cargo from Hong Kong to Europe fell 30% year over year in August 2026, per WorldACD data reported September 7. Mainland China to Europe fell 5%, the two combined 14%, while global air cargo grew 5% — a lane emptying, not a market softening.

Math: Average spot rates from China and Hong Kong to Europe fell from $5.22 per kilogram before July to $4.34 in August — $0.88 per kilogram, or $880 on a 1,000-kilogram shipment before surcharges and forwarder markup. August rates were still 11% above a year earlier: a decline from a peak, not a cheap lane.

Execute: WorldACD attributes the drop to the EU import duties effective July 1, 2026, which carry a EUR 3 minimum. That duty created the capacity you are now offered and applies to the parcels you would put in it — price landed cost with duty, VAT and clearance before calling the rate a saving. (EcomCrew)

4. Seller Community Pulse

EcommerceBytes ceased publication on September 14, 2026, after 27 years. David and Ina Steiner launched it as AuctionBytes in 1999, covering eBay, Amazon and Etsy from the seller's side. The archive went with it — older article links now redirect to the farewell notice or error out. This publication cited it twice on September 11; those links no longer resolve. If you have leaned on it for a policy date or fee history, capture what you need from cache now. (Value Added Resource)

5. Looking Ahead

September 16: FBA inbound deadline for Prime Big Deal Days, Amazon-optimized splits.
September 17: PBI3 Port St. Lucie fulfillment center closes.
September 18: CBP may begin voiding Importer of Record numbers over inaccurate Form 5106 data.
September 22-24: Amazon Accelerate 2026 in Seattle; CBP Entry Type 13 deploys to ACE September 22.
September 28-30: Amazon unBoxed 2026 at Moscone West, San Francisco.
September 30: Business Hour Delivery Rate takes effect for US seller-fulfilled Amazon Business orders.
October 14, 21 and 28: BFCM inbound deadlines — AWD, minimal, Amazon-optimized splits.
October 15: FBA holiday peak fulfillment fees begin, averaging $0.32 per unit through January 14, 2027.
October 17: Weekend orders stop being excluded from Seller Fulfilled Prime speed metrics.
October 20: Black Friday Week and Cyber Monday deal submission closes.
October 25: Amazon Shipping peak demand surcharges begin, through January 16, 2027.
November 2: Commercial liability insurance changes take effect for 11 enhanced-safety categories.
January 11, 2027: Amazon's bundling policy changes; noncompliant bundles are deactivated.

All dates 2026 unless stated; Q4 deadlines per EcomCrew.