Monitoring Minimum Advertised Prices: What Detection Has to Catch

Four things will make your MAP compliance figure look better than it is. Reading the sticker price instead of the price a shopper ends up with. Checking the listing page and missing the ad. Checking on Tuesday morning. Matching on your part number, which the violator never used.

Detection is the cheap half of a MAP programme. Detection that under-reports is worse than none. It produces a number somebody will present to a board.

First, what MAP is measuring

MAP sets the lowest price at which a reseller may advertise the product. It is separate from a minimum resale price, which governs what the reseller may charge at checkout. Under a MAP policy a reseller can sell at whatever price they choose, as long as the advertised figure holds.

That distinction decides what monitoring has to look at. You are auditing advertisements, wherever they appear, and not the till.

The number a shopper ends up seeing

The listing price is a starting point. The figure that matters is what shows after everything has been applied. A site-wide coupon. A bundle spreading a discount across items. A promotional code on the page itself. Any marketplace promotion the platform runs on the seller’s behalf.

A price that appears only once the item is in the cart is a separate question. It is usually there to keep a low number off the page, and whether it breaches depends on how your policy defines an advertisement. Define it, then monitor to the definition instead of around it.

Every channel the price is published through

Dealer and reseller websites. Marketplace listings. Sponsored ads inside those marketplaces, which can carry a different price from the listing. Comparison shopping feeds, which go stale and keep yesterday’s promotion live. Email campaigns and social posts, which are advertisements that never appear on a product page at all.

A programme that only watches product pages is watching the one place a careful violator does not put the number.

When you check

Price changes are scheduled by the people making them. A seller who drops below policy on Friday evening and returns on Monday morning is compliant in every weekday business-hours crawl ever run.

Vary the times. Include evenings, weekends and public holidays, and do not settle into a predictable slot. A seller who can work out your crawl window has a compliant catalogue for your purposes and a discounted one for everybody else.

What you match on

Listings routinely use a distributor’s part number, a wholesale number, an OEM cross-reference or one the seller invented. Matching on your own part number alone systematically misses those, and the miss always goes the same way, which is towards a tidier report.

Build the cross-reference from your catalogue and from distributor numbering, and keep it current as new lines land. In automotive and powersports this is most of the work in making coverage real.

Record the compliant listings too

Count only violations and you have measured how hard you looked. The figure that says whether the programme is working is the share of listings found that sit at or above policy. You can only produce it by recording the compliant ones.

Take that reading before the first notice goes out. Without a starting point, every later claim about improvement is an opinion.

Capture evidence at the moment

A URL, a timestamp and a screenshot, kept and retrievable months later. Sellers correct a price after a notice and then say it was never there. With a capture, that exchange takes one reply. Without one, it takes a week and you lose.

What the tools do, and where they stop

Crawling, price extraction and alerting are all solved problems and worth buying. What no tool does is work out who the seller is, write the notice, chase the silence and decide about supply. Judge a monitoring product on the quality of its matching and its evidence. Judge the programme on what happens in the days after the alert.