MAP monitoring: how brands catch minimum advertised price violations

What is MAP monitoring?

MAP monitoring is how a brand checks that resellers advertise its products at or above the minimum advertised price it has set, and keeps proof of any that don't. It covers the advertised price only: as the law firm GGB Law puts it, 'MAP controls advertised prices only, not resale prices'. Three pricing terms get mixed up:

MAP pricing compliance means that resellers' advertised prices meet the brand's policy. Monitoring it means checking the places the policy covers, such as websites, marketplace listings, comparison shopping feeds and printed ads, often enough to catch a below-MAP price while it is still live. For tracking a single price on any page, see how to track price changes on any website.

What is a MAP policy?

A MAP policy is a brand's written rule setting the lowest price at which resellers may advertise its products, and the consequences for advertising below it. Many are written as one-sided policies rather than contracts. PDI's MAP policy, for example, states that 'This Policy is not an agreement', and says sellers 'remain free to advertise and sell all of our products (including the Covered Products) at any price', with the brand free to stop supplying them.

A typical MAP policy says which channels count as advertising, how cart prices, coupons and bundles are treated, whether in-store ads are included, and when MAP holidays apply. LuminAID's policy, for example, says 'This policy does not apply to in-store advertising' and lists its MAP holiday dates.

Is MAP pricing legal?

In the US, a MAP policy is generally legal when the brand sets it on its own and simply stops supplying resellers who ignore it. United States v. Colgate (1919) recognized a seller's right to 'announce in advance the circumstances under which he will refuse to sell'. The Federal Trade Commission (FTC) puts it this way: 'If a manufacturer, on its own, adopts a policy regarding a desired level of prices, the law allows the manufacturer to deal only with retailers who agree to that policy.' It adds: 'A manufacturer also may stop dealing with a retailer that does not follow its resale price policy.' Going along with a policy is not the same as promising to: in Monsanto v. Spray-Rite (1984), the Supreme Court said 'a distributor is free to acquiesce in the manufacturer's demand in order to avoid termination.'

Leegin v. PSKS (2007) held that 'vertical price restraints are to be judged by the rule of reason', case by case, so even an agreed minimum resale price is not illegal outright under federal law. United States v. Parke, Davis (1960) marks the limit of the one-sided approach: a manufacturer that secures adherence to its prices by means beyond simply refusing to deal becomes, in the Court's words, 'the organizer of a price-maintenance combination or conspiracy'.

States can be stricter. The FTC notes that 'some state antitrust laws and international authorities view minimum price rules as illegal, per se', and since 2009 Maryland law has treated a contract setting a minimum resale price as an unreasonable restraint of trade.

MAP programs can also go too far. In 2000, the five largest distributors of recorded music settled FTC charges over MAP policies that covered even in-store signs and ads retailers paid for themselves, and could cost a retailer its cooperative advertising funds for all its stores for up to 90 days after one violation. The FTC said consumers 'may have paid as much as $480 million more than they should have' for CDs over three years.

This is general information, not legal advice. How a MAP policy is worded and enforced decides whether it stays one-sided, so have a lawyer review yours.

What counts as a MAP violation?

A MAP violation is an advertised price below the brand's MAP in any channel the brand's policy covers, such as 'a website, marketplace listing, comparison shopping feed, or printed circular', as Competera lists them. The selling price itself is not a violation. The most common MAP policy violations are:

• Below-MAP listings on marketplaces and dealer sites, often set by repricing software acting without reference to the brand's policy, as Competera notes.
• Cart-only prices, shown with wording such as 'see price in cart' or 'add to cart for price', where the policy bans them. PDI's policy bans these; other policies allow them.
• Coupon and promotional codes that take the advertised price below MAP, where the policy bans them. LuminAID allows product-specific coupon codes; PDI bans promotional codes that do this.
• Bundles and multipacks priced below the combined MAP of their items.
• Comparison shopping listings, such as Google Shopping, showing a price below MAP.

Google Merchant Center has its own rule for this. Merchants who sell a product for less than the price allowed by third-party agreements should 'Submit the minimum advertised pricing (MAP) value as the "price"' in their product data. They may show a note such as 'Add to cart for final price' on the landing page, but not 'View price in cart'.

On 11 October 2026, Academy Sports + Outdoors' own site showed 'Our Price In Cart' instead of a price for some YETI items. That is cart pricing, not necessarily a violation: YETI's own policy, which we have not seen, decides.

How common are MAP violations?

MAP violations are common, and far more common among sellers the brand never authorized. In a 2016 Marketing Science study by Israeli, Anderson and Coughlan of over 1.25 million daily online prices from about 1,000 retailers, unauthorized retailers advertised prices below MAP as much as 50% of the time, against about 20% for authorized retailers.

In a September 2026 analysis by GrowByData, which sells MAP monitoring, of 617,958 reseller and product observations for six brands between January 2024 and August 2026, Google Shopping accounted for 80% of recorded violations. Violation rates were 33.3% on Google Shopping, 20.9% on Amazon and 10.0% on Walmart, and in GrowByData's data the worst 10% of reseller and brand combinations produced 86% of violations.

Enforcement pays off. A 2018 Marketing Science study by Ayelet Israeli found that a manufacturer's new enforcement policies led to 'substantially fewer violations', and that 'channel prices increase by 2% without loss in volume.'

How to enforce a MAP policy

Enforcing a MAP policy means writing it as a one-sided policy, monitoring the channels it covers, and applying the same consequences to every reseller who breaks it. This is common practice, not legal advice: have a lawyer approve the policy and the notice template. A typical sequence:

1. 1Write the policy as a policy, not an agreement. Say which channels count as advertising, how cart prices, coupons and bundles are treated, and whether in-store ads are included.
2. 2Monitor every channel the policy covers, on a schedule, and keep timestamped evidence: the page address, the advertised price and a screenshot.
3. 3Send a written notice for a first violation, with the evidence.
4. 4Escalate the same way every time. PDI's published ladder runs from a written notice, to a notice with a 14-day shipping hold, to 'Termination of business relationship and revocation of "authorized" status.'
5. 5Decide alone. Do not ask retailers for input on enforcement, and do not ask a reseller to promise it will comply; under Parke, Davis (1960), securing adherence beyond a refusal to deal can turn a policy into an agreement.
6. 6Announce any MAP holidays, the windows when the brand relaxes MAP for a promotion, in advance and to all resellers.

A MAP policy only has force with resellers the brand supplies, because its consequences, from shipping holds to being cut off, only reach them; the law firm Vorys notes that 'MAP policies are not binding on unauthorized retailers.' For unauthorized sellers, one approach is to trace which authorized distributor supplied them, for example with a test purchase, and enforce your distribution agreement if it limits whom the distributor may sell to. Act on whom it sold to, not on the reseller's price: in Parke, Davis, using wholesalers to cut off price-cutting retailers is what the Court held created a combination.

Marketplaces act only on intellectual property (IP) claims, and reselling genuine goods is generally not trademark infringement, so file one only with a real basis, such as counterfeits, and with a lawyer. For counterfeit listings, see trademark monitoring.

Do Amazon and Walmart enforce MAP?

No. Amazon says enforcing distribution agreements is not its role, and Walmart Marketplace's published pricing and Brand Portal rules do not cover MAP. Amazon's policy, as quoted by the American Intellectual Property Law Association, says that violations of a manufacturer's exclusive distribution agreements 'do not constitute intellectual property rights infringement' and that 'it would not be appropriate for Amazon to assist in enforcement activities.' Amazon's Report a Violation tool covers IP infringement, store policy and regulatory concerns, and does not mention pricing.

Walmart Marketplace's pricing rule unpublishes offers 'priced egregiously higher' than they should be, and its Brand Portal takes claims of copyright, trademark, patent and counterfeit. Google Shopping has a MAP rule, but it governs how merchants submit prices, not enforcement for brands.

MAP monitoring software compared

As of 11 October 2026, MAP monitoring software runs from $49 a month (MapAuthority) to $999, and Wayvia, TrackStreet, Intelligence Node and Wiser quote on request. These tools check listings across marketplaces and retailer sites, match them to your products and sellers, and document violations. From each vendor's own pages, plus news reports for Wiser and Wayvia:

Choose by where your products sell. Amazon-heavy brands can start with an Amazon-focused tool; brands sold through many dealers and Google Shopping need wide coverage and screenshots. Ask every vendor whether it can see cart-only prices, coupons and member prices, since coverage of these varies by tool, and whether its evidence holds up when a reseller disputes a notice. For your own competitive pricing, see competitor price monitoring.

Which retailer pages Website Change Tracker can read

Four of 26: when Website Change Tracker's checker tried 26 retailer and marketplace sites on 11 October 2026, 15 refused the request outright and four returned prices it could read:

Where a page monitor fits in MAP monitoring

A page monitor fits one MAP job: watching a short, known list of dealer pages you name. It does not find every listing of your product the way MAP monitoring software does. Some dealer sites are readable: the one dealer that answered our checker was a Shopify store, whose Kamado Joe page read 'Current Price: $1,999.99 … Out of Stock', while the dealer sites Sweetwater, Crutchfield and BBQGuys returned 403. Website Change Tracker suits a brand whose authorized dealers sell on their own websites, where those sites are readable to it:

1. 1List the dealer pages for the products you most need to protect.
2. 2Pick a plan and add each dealer page to monitor.
3. 3Open each page's first saved version. It shows whether the price was read, and the first check never alerts, so a dealer already below your MAP shows up there, not in your inbox.
4. 4Write the rule as your MAP, such as 'tell me when the advertised price on this page goes below $499'. A plain-English rule alerts on changes that take the price below that line, not on every change.
5. 5Check daily on Basic, or hourly on Starter for products where a day below MAP costs you.
6. 6Keep the alerts. Each change is saved with the old and new text, the time it was first seen and, where the page allows it, a screenshot. Starter and above keep that history without a time limit.

Website Change Tracker reads the HTML a page sends without running its scripts, so prices loaded by JavaScript, cart-only prices, coupons and member prices are invisible to it. A failed check sends no alert; the dashboard shows the error instead. For Amazon, Walmart and Google Shopping listings at scale, use MAP monitoring software such as Trade Vitality, whose stated coverage includes all three, or confirm Google Shopping coverage with Frigginyeah or Wayvia.

Which plan you need for dealer monitoring

Up to 50 dealer pages fit Website Change Tracker's Starter plan ($30 a month, hourly checks, unlimited history); 5 fit Basic ($5 a month, daily checks, 7 days of history). Each dealer product page counts as one page:

Billed yearly, Basic is $4 a month, Starter $24 and Pro $120. For other pages brands monitor, see website monitoring for business and how to track price changes on any website.