Can you track before consent if you anonymise it?
It is a tempting loophole: if you strip out anything identifying, surely you can measure people before they consent? Sometimes, within limits, but the line is finer than most assume, and getting it wrong is still a breach.
Where the line actually is
The law on cookies (PECR) is about accessing or storing information on a device, not only about personal data. So setting most cookies still needs consent even if the data is anonymous. What you can do without consent is genuinely anonymous, cookieless measurement that stores nothing on the device and cannot single anyone out.
What that looks like in practice
- Aggregate, cookieless counts that hold no identifiers.
- Consent Mode in advanced mode, which sends anonymous, cookieless pings before consent and models the rest, exactly to stay on the right side of this.
- Some privacy-first analytics tools built to be consent-exempt.
The honest takeaway
You cannot run normal GA4 or the pixel before consent and call it anonymous. You can capture privacy-safe, aggregate signals. This is not legal advice, but it is the technical reality, and Consent Mode is the mainstream way to do it properly. See how to track without cookies.
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