Ad fraud in 2026: how brands check if users are seeing real ads

Digital advertising has long been the largest item of marketing spending — and at the same time one of the most attractive targets for fraudsters. According to industry analysts, global losses to advertisers from ad fraud in 2026 will exceed $100 billion per year. These are not just “tricked” clicks by bots: increasingly, we are talking about more complex schemes in which the advertiser sees one picture, and the real user sees a completely different one. We tell you how these schemes work and what tools brands use to check their own campaigns today.

The scale of the problem: from bots to creative substitution

The classic idea of ​​ad fraud is bot farms that simulate impressions and clicks. But modern ad fraud is much more diverse:

• Fake placements. Dishonest sites report placing ads in "premium" positions, while in reality the banners are displayed in hidden frames, overlap each other, or are not displayed at all.
• Malvertising. Creatives with malicious code or redirects to phishing pages are distributed through legal ad networks. This is a double blow for the brand: the budget is spent, and the user receives fraudulent content next to their name.
• Landing page substitution. In affiliate (partner) campaigns, a chain of redirects can lead the user to a completely different place than the advertiser agreed to, even to pages with prohibited offers.
• Violation of regional conditions. A campaign paid to run in one country is “merged” into other regions with cheaper traffic, and reporting paints a flawless geography.

The common feature of all these schemes is information asymmetry. Fraudsters do everything they can to ensure that the advertiser never sees the campaign through the eyes of a real user.

How deception works: geo-cloaking

The key technology behind most of these schemes is cloaking. The scammer's server determines who is opening the page and shows different content to different visitors.

The determination is made based on several criteria: IP address and its affiliation (data center, office network, home provider), geolocation, browser language, device type. If the request comes from the IP range of the advertising network, the advertiser's office or cloud data center, the system shows a "clean" version: a correct banner, an agreed landing page, the correct region. And when the same placement is opened by an ordinary user from the home Internet, he sees something completely different: an aggressive fraudulent creative, a substituted landing page or a competitor's advertisement.

That's why a "manual" check from the marketing department's office yields almost nothing: for a cloaking system, a brand's office IP address is a red flag, and it will always be shown the perfect picture.

How brands catch it: through the eyes of the user

The ad verification industry is built on a simple principle: to see what a user sees, you have to become that user. In practice, this means verifying campaigns through the IP addresses of common home ISPs in each targeted country or city.

For this, verification teams use resident proxy for advertising verification — networks of IP addresses of real home Internet providers. A request through such an address is no different for the advertising system from a visit by an ordinary resident of Kyiv, Warsaw, or Berlin, so cloaking filters do not work, and the reviewer sees the campaign exactly as the audience sees it.

A typical verification process looks like this:

• the campaign is opened from the IP addresses of each region for which impressions were purchased and the actual content is compared with the platform's reports;
• go through the entire chain of affiliate link redirects and record the final landing page;
• check whether harmful or prohibited content appears next to the brand;
• monitor whether fraudulent ads in search results in other countries are using the brand name.

Large advertisers automate this process: scripts “walk” placements from dozens of geolocations every day and compare screenshots and redirect chains with reference ones. A discrepancy is a reason for investigation before the budget is spent.

What does this mean for Ukrainian advertisers?

The Ukrainian digital advertising market is growing, and with it the interest of fraudsters. A practical minimum that should be implemented now:

• Check impressions from target regions, not from the office. If the campaign is targeted at multiple countries, view it from the IP addresses of each of them.
• Audit partner chains. Regularly review affiliate links to the final page and capture all intermediate redirects.
• Monitor the brand in the issue. Fraudulent advertising for branded queries is often shown only in certain regions - it cannot be seen without checking "from within" these regions.
• Demand transparency from platforms. Screenshots and log files are good, but independent verification by the user's eyes is more reliable.

Ad fraud evolves with technology — in 2026, AI-generated creatives and deepfake ads featuring famous faces were added to the classic schemes. But the basic principle of protection remains the same: trust the reports, and verify them with the eyes of a real user from a real region. Brands that have built such verification into their daily processes lose many times less to fraud than those who still only look at their campaigns from their own office.