Fraud Type Guide
Programmatic advertising moves billions of dollars through automated auctions every day. Fraudsters have built an entire economy around exploiting that automation.
Programmatic advertising uses algorithms and real-time bidding (RTB) to buy and sell ad inventory automatically. Advertisers set targeting criteria, and the system matches their ads to available impressions in milliseconds — without human intervention at the transaction level.
This speed and automation is what makes programmatic efficient, but it is also what makes it vulnerable. Fraudsters exploit the lack of human oversight by inserting fake inventory into the supply chain, spoofing premium domains to command higher CPMs, and using bot traffic to generate the impressions and clicks that trigger payments.
The scale of the problem is significant. Industry estimates suggest that between 10–30% of programmatic ad spend is wasted on fraudulent inventory, depending on the supply path complexity and verification measures in place.
Programmatic fraud takes many forms, each targeting a different vulnerability in the automated buying process.
Fraudulent publishers misrepresent their sites as premium domains in bid requests. Your ad appears on a low-quality or non-existent page while you pay premium CPMs for what you think is tier-one inventory. See our domain spoofing guide.
Multiple ads are layered on top of each other in a single ad slot. Only the top ad is visible, but impressions are recorded for every ad in the stack. See our ad stacking guide.
Ads are rendered in 1x1 pixel iframes that are invisible to the human eye. The ad technically loads and triggers an impression, but no real user ever sees it. See our pixel stuffing guide.
Automated bots visit publisher sites to inflate traffic numbers and generate ad impressions. This non-human traffic creates the illusion of audience scale that doesn’t exist.
Intermediaries in the supply chain misrepresent inventory quality, bundle fraudulent placements with legitimate ones, or skim margins through undisclosed reselling. See our supply-side fraud guide.
Ad slots automatically refresh at rapid intervals to generate multiple impressions from a single page load, without the user scrolling or interacting. See our auto-refresh fraud guide.
Several structural characteristics of programmatic advertising make it a particularly attractive target for fraud.
Transactions happen in milliseconds with no human review. There is no pause to verify that a publisher is who they claim to be or that an impression will be seen by a real person.
Ads can pass through multiple exchanges, SSPs, and resellers before reaching a publisher. Each hop adds opacity and creates opportunities for fraud to be inserted.
Publishers are paid per impression or click. This creates a direct financial incentive to inflate traffic numbers, whether through bots, auto-refresh, or ad stacking.
Advertisers often lack granular visibility into where their ads actually appear. By the time fraud is detected in post-campaign analysis, the budget is already spent.
Opticks integrates via a lightweight tag — install through Google Tag Manager in under five minutes with no code changes required.
Every impression and click is analysed against 30+ fraud signals in real time, catching domain spoofing, bot traffic, and suspicious patterns before they drain your budget.
See which exchanges, SSPs, and publishers are delivering clean traffic versus fraudulent inventory. Identify the riskiest supply paths across your programmatic buys.
Use Opticks data to build exclusion lists, optimise toward verified human traffic, and provide evidence to demand-side platforms for credit claims on fraudulent impressions.
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See how Opticks identifies fraudulent impressions and bot traffic across your programmatic campaigns in real time. No code changes required — install via Google Tag Manager in under five minutes.