Guide

How to Stop Fake Clicks on Google Ads: Detection and Defence for 2026

By Elena Rodriguez

Reviewed by Senior Media Buyers

Fake clicks eat up 14-25% of ad budgets. Google's filters don't catch sophisticated SIVT (residential proxies, AI agents). The answer is managed click-fraud protection that works with Performance Max and gets your refunds back.

Why Fake Clicks Keep Happening Despite Google's Filters

Google uses automated systems and human reviewers to spot invalid clicks, filtering out obvious bots and repeated IPs. But sophisticated invalid traffic (SIVT), things like residential proxy networks, click farms and AI-driven agents, slips through those filters. Industry estimates suggest 14-25% of paid clicks are invalid, costing advertisers billions every year. The gap exists because Google's detection is reactive and can't block every new fraud pattern, especially ones that mimic real human behaviour.

With Performance Max campaigns, the problem is even bigger: Google blocks third-party APIs, stopping self-serve IP blockers from analysing or filtering clicks. That leaves advertisers blind to fraud inside automated campaign types. Managed click-fraud protection services plug that gap by using their own detection methods and working with Google's refund process.

Key Signs of Fake Clicks to Watch For

Spotting fake clicks means looking further than raw click numbers. Keep an eye out for these signals:

• Abnormal CTR spikes: Sudden jumps from a single IP or geographic area, especially outside regular business hours.
• Low conversion rates: High click numbers with zero or very few conversions, or extremely short session durations.
• Repetitive IP patterns: Multiple clicks coming from the same IP within minutes, or clicks originating from data centre IPs instead of residential ones.
• Unusual device/browser combos: Clicks from outdated browsers, headless browsers or mismatched user agents.
• Click timing: Bots often click at regular intervals (say, every five seconds) or all at the same time.

Use Google Ads' built-in 'Invalid clicks' column and Google Analytics' real-time reports to spot anything unusual. But bear in mind these tools only show data after filtering, so they won't reveal blocked attempts or sophisticated SIVT.

Practical Steps to Cut Down Fake Clicks

Start with these self-service measures:

• Exclude known bad IPs: You can use IP exclusion lists in your campaigns, but bear in mind this is a reactive measure and won't do much against rotating residential proxies.
• Set click frequency caps: Limit how many times the same person sees your ad (for instance, 3 clicks per day).
• Use negative placements: Exclude poor-quality websites and mobile apps from your display network campaigns.
• Turn on auto-tagging and track conversions: Make sure conversion tracking is spot-on so you can measure real ROI.
• Keep an eye on geographic and time performance: Pause ads in regions or time slots where invalid click rates are high.

These measures help with basic bot traffic, but they fall short against advanced SIVT. For full protection, think about a managed service that spots and blocks fraud in real time, including on Performance Max.

Why DIY IP Blockers Can't Handle Modern SIVT

Traditional click fraud tools lean on IP blocklists and simple pattern matching. But modern fraud relies on residential proxy networks, legitimate IPs from real devices, which makes IP blocking ineffective. Click farms use human workers who click manually, mimicking real behaviour. The fastest-growing threat is AI-agent traffic, which can mimic human mouse movements and browsing habits. Industry reports show AI-agent fraud has gone up about 78 times year on year, and these agents are designed to avoid detection by rotating IPs, user agents, and timing.

DIY tools also can't protect Performance Max campaigns because Google restricts third-party access to PMax click data. Only managed services with direct integrations or refund recovery workflows can get around this blind spot.

How Managed Click-Fraud Protection Bridges the Gap

Managed click-fraud protection services like Unled Network provide ongoing monitoring and blocking of sophisticated invalid traffic. They use advanced algorithms to detect residential proxy traffic, click farms, and AI agents in real time. For Performance Max, they work around API limits by analysing post-click behaviour and coordinating with Google's invalid traffic refund process to recover lost budget.

Key benefits include:

• Real-time blocking: Fraudulent clicks are filtered out before they reach your campaign, protecting your budget and data integrity.
• Refund recovery: Experts submit invalid-click refund requests to Google, recovering up to 90% of fraudulent spend.
• No annual lock-in: Flexible month-to-month contracts let you scale protection as you need it.
• Coverage for all campaign types: Including PMax, Search, Display, and YouTube.

By outsourcing detection to specialists, advertisers can focus on strategy while making sure their budgets go on real human traffic.

The Role of Google's Invalid Traffic Refund Process

Google offers refunds for invalid clicks it spots after the fact, but the process is manual and needs detailed evidence. Advertisers have to put in a request through Google Ads support, providing logs of suspicious clicks. Google then reviews it and may credit the account. But many advertisers miss this chance because they lack the data or know-how to build a strong case.

Managed services simplify this by automatically collecting evidence and submitting refund requests on your behalf. They also track which clicks were refunded, giving you a clear picture of protection ROI. Bear in mind that refunds aren't guaranteed, but with proper documentation, recovery rates can be high.

Frequently Asked Questions