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Amazon Hijacker Alert — Know Who Appeared on Your Listing | SentryKit
Hijacker Alert  ·  Included on Every Plan

Know who hijacked your listing — and have their profile to act.

Every hijacker alert includes the unauthorized seller's fulfillment type, feedback score, and listing count — so you can tell the difference between a counterfeit reseller and an unauthorized distributor before you decide what to do next.

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30-day free trial
No credit card required
All ASINs monitored from day one
Near
real-time detection — fires the moment an unauthorized seller appears on your listing
FBM + FBA
both fulfillment types caught — hijackers show up in both channels
Profile
feedback score, listing count, and fulfillment type — on the first alert
30 days
Free trial — full hijacker monitoring from day one, no credit card
Know the Threat Before You Act

Not every hijacker is the same.
Your response shouldn't be either.

Most tools fire a generic "new seller" notification with no context. That leaves you guessing — is this a counterfeiter, a grey-market reseller, or an unauthorized distributor? SentryKit surfaces the seller profile on the first alert so you know which response applies before you've made a move you can't undo.

FBM Hijacker Detected
Unknown FBM seller appeared on your listing — 37% below your price.
FBM hijackers with low feedback and few listings are a common pattern for counterfeit or grey-market resellers. They're competing directly for your Buy Box at a price that can't be matched without destroying your margin. Speed matters — every hour they're live is revenue and brand equity at risk.
SentryKit alert includes
Seller name, fulfillment type (FBM), feedback score Active listing count — key indicator of counterfeit risk Their price vs yours and the % gap 3 ranked options — document, report, or test buy
FBA Hijacker Detected
Established FBA seller now competing on your listing — 16% below your price.
An FBA hijacker with high feedback and hundreds of listings may be an unauthorized distributor rather than a counterfeiter. Filing a counterfeit complaint without checking your authorized seller list first can result in a false report. The profile in the alert tells you whether to enforce MAP or escalate to Brand Registry.
SentryKit alert includes
Seller name, fulfillment type (FBA), feedback score Active listing count — established vs new account Their price vs yours and the % gap 3 ranked options — check list, report, or enforce MAP
Do not match a hijacker's price. Dropping to meet them validates their presence and trains more sellers to do the same. The seller profile in the alert tells you whether to report, enforce, or buy a test unit — not to compete on price.
The Alert

Here's exactly what lands
in your inbox — with everything you need to act.

SentryKit doesn't just tell you a new seller appeared. It tells you who they are, how established they are, what they're charging, and whether you're looking at a counterfeiter or an unauthorized distributor — so you can make the right call before leaving the alert.

A hijacker appeared. You had their profile before they took your Buy Box.
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From Alert to Recovery

The alert tells you who appeared.
Here's how sellers act on the data.

SentryKit's hijacker alerts are designed to make the next step obvious — not leave you Googling how to respond. The path splits based on what the seller profile shows. Both paths are in the alert.

FBM Hijacker — Recovery Path
1
Screenshot their listing and price immediately — this is your evidence.
Before doing anything else, capture the unauthorized seller's listing, their price, and your price side-by-side. Hijackers sometimes remove their offers after being reported — documented evidence at the time of detection significantly strengthens any complaint you file with Amazon. The seller name and profile details in the SentryKit alert are your starting point.
2
File an IP or counterfeit complaint via Amazon Brand Registry.
Navigate to Amazon Brand Registry → Report a Violation. Use the seller name from the SentryKit alert to locate their listing. Brand Registry complaints are handled with higher priority than general Seller Central reports. If you are not Brand Registry enrolled, you can still report via the Report Abuse option on the listing itself.
3
Send a cease and desist via Amazon buyer-seller messaging.
A formal cease and desist through Amazon's messaging system creates a documented paper trail and gives the seller notice before you escalate the complaint. Keep the tone professional and factual — reference your brand ownership and state that their listing is unauthorized. Amazon's messaging logs can be referenced in any subsequent escalation.
4
Order a test buy if you need physical evidence of inauthentic goods.
If you suspect the seller is selling counterfeit or inferior versions of your product, a test purchase gives you physical evidence to include with a formal counterfeit complaint. Amazon's counterfeit complaint process is significantly faster when you can demonstrate the product does not match your original. Document the packaging, labeling, and product quality against your own.
FBA Hijacker — Recovery Path
1
Cross-reference the seller profile against your authorized distributor list.
An established FBA seller with high feedback and hundreds of listings is a different risk profile to a low-feedback FBM account. Before filing a complaint, confirm this seller is not an authorized distributor, wholesale partner, or licensee. A false counterfeit complaint against a legitimate partner can damage the relationship and be disputed with Amazon.
2
If unauthorized: file a Brand Registry report for unauthorized sale.
Once you've confirmed the seller is not an authorized partner, file a Report a Violation through Amazon Brand Registry for unauthorized sale of your product. Use "unauthorized seller" rather than "counterfeit" unless you have verified the product is inauthentic — the complaint category affects how Amazon prioritises the review.
3
Send a MAP policy violation notice via Amazon messaging.
If the seller is undercutting your Minimum Advertised Price, send a formal MAP policy violation notice via Amazon's buyer-seller messaging system. This creates a documented paper trail that strengthens any further escalation. Include your MAP policy terms and the specific price they are violating.
4
Escalate to Amazon Brand Protection if they don't remove their offer.
If the seller remains on your listing after your Brand Registry report and MAP notice, escalate to Amazon Brand Protection. Document every step: the SentryKit alert timestamp, the complaint reference number, and the messaging thread. A complete paper trail is the most effective lever when escalating beyond the standard Brand Registry process.
How It Works

Intelligence that tells you who appeared, and what to do.
Not just that something changed.

SentryKit monitors your listings continuously — connected directly to your Amazon account. Every hijacker alert ships with the seller context that makes the right response obvious from the moment it lands.

Fires the Moment They Appear
Near real-time detection the instant an unauthorized seller is detected on your listing. Every minute they're live they're eligible to compete for your Buy Box — early detection gives you the window to act before they take it and before customers receive an inferior product.
Full Seller Profile on First Alert
Fulfillment type, feedback score, and listing count included from the start. Enough to tell a first-time grey-market reseller from an established FBA distributor — so your response is calibrated to the actual threat rather than treated as the same problem every time.
FBM and FBA Both Caught
Unauthorized sellers show up in both fulfillment channels. SentryKit catches both and surfaces the fulfillment method in the alert so you know immediately whether you're dealing with an outside reseller (FBM) or an established account using Amazon's own warehouses (FBA).
30-Day Free Trial — All ASINs, Every Plan
Hijacker alerts are included on every SentryKit plan. Starter ($19/mo) — up to 2,000 orders/month, real-time hijacker detection on all ASINs. Pro ($49/mo) — up to 10,000 orders/month. Both plans include a 30-day free trial, no credit card required.
All SentryKit alerts — 20+ signals, every layer of your listing
Buy Box Alert
Lost vs Suppressed — separate alerts, separate recovery paths.
Price Change Alert
Floor breach and competitor undercut — two separate signals, two different fixes.
Latest Reviews
New reviews posted on your ASIN — 1-star to 5-star, all caught.
Top Rated Reviews
High-impact reviews surfacing at the top of your listing.
Suspended Listing
Listing taken down — with policy notice and case ID details.
Search Suppression
Listing removed from Amazon search results entirely.
Add to Cart Button
Add to Cart removed from your product page without Buy Box loss.
FBA Stock Alert
FBA inventory hit zero — Buy Box at immediate risk.
FBM Stock Alert
FBM stock levels dropping below your set threshold.
Sales Volume Alert
Unusual sales movement vs your rolling baseline — drops and spikes.
FBA Fee Change
Amazon updated the FBA fulfilment fee on your ASIN.
Product Details Change
Title, bullet points, or description edited on your listing.
Main Image Changed
Primary product image swapped — with before/after record.
Category Change
ASIN moved to a different Amazon category — affects rankings and fees.
Parent Product Change
ASIN reassigned to a different parent variation.
Best Seller Badge
#1 Best Seller badge won or lost on your ASIN.
Amazon's Choice
Amazon's Choice badge gained or removed from your listing.
Subscribe & Save
Subscribe & Save eligibility changed on your ASIN.
Explore all SentryKit Alerts →

Know who hijacked your listing — and have the profile to act.

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Frequently Asked Questions

A listing hijacker is an unauthorized seller who adds themselves to your branded product listing and competes for the Buy Box — often with counterfeit, grey-market, or lower-quality versions of your product. For private label sellers who should be the sole seller on a listing, any new seller appearing is a hijacker by definition. The risk is a lost Buy Box, a price race to the bottom, and customer reviews reflecting someone else's inferior product.
SentryKit's hijacker alert fires in near real-time the moment an unauthorized seller is detected on your listing. Every minute they're live they're eligible to compete for your Buy Box — early detection gives you the window to act before they take it and before your customers receive an inferior product.
Every SentryKit hijacker alert includes the unauthorized seller's display name, fulfillment type (FBA or FBM), feedback score, number of active listings, their listed price versus yours, and the percentage they are below your price. This is the profile you need to determine whether you are dealing with a counterfeit reseller, a grey-market distributor, or an unauthorized seller who needs a formal Brand Registry complaint.
An FBM hijacker is typically a low-feedback, low-listing-count seller operating outside Amazon's fulfillment network — a common pattern for counterfeit or arbitrage sellers. An FBA hijacker is more established, using Amazon's warehouses, and may be an unauthorized distributor rather than a counterfeiter. The seller profile SentryKit surfaces helps you calibrate your response: test buy and IP complaint for FBM, authorized-seller check and MAP enforcement for FBA.
Brand Registry significantly speeds up enforcement — you can file Report a Violation directly and Amazon prioritises responses. Without Brand Registry you can still send cease and desist notices via Amazon's buyer-seller messaging and report the seller, but response times are longer. SentryKit's alert gives you the seller profile you need for both routes regardless of your Brand Registry status.
Start a 30-day free trial at live.sentrykit.com/signup — no credit card required. Connect your Amazon Seller Central account and SentryKit begins monitoring your listings immediately. When a new seller appears on any of your ASINs, the hijacker alert fires in near real-time with their full profile so you can act before they take your Buy Box.