Cookie banner / CMP

A cookie banner is the visible half of the consent flow, no CMP means no documented opt-in.

What we check

Detects 11 common cookie banners: OneTrust, Usercentrics, Cookiebot, Didomi, and more.

Why it matters

A cookie banner is the visible half of the consent flow, no CMP means no documented opt-in.

Common causes

There simply is no CMP, and the tracking has run without a consent layer for years.
The CMP only loads on the homepage; campaign landing pages or a separate shop run without a banner.
A self-built banner without a CMP backend: visible yes, but with no audit trail and no tag-blocking behind it.
After a relaunch the CMP script no longer loads from an old template, and nobody notices because the banner cookie still sits in their own browser.
The CMP is loaded through the tag manager and thereby loses exactly the window in which it should block tags.

The fix

Integrate a CMP (Usercentrics, Cookiebot, consentmanager) and enable tag-blocking. The CMP script belongs directly in the HTML before all tracking snippets, not in the tag manager. For Usercentrics setups: how the chain continues into the server container is covered in Usercentrics + Server-Side GTM; we run the platform as a certified partner.

Matching template

Consent Mode Audit Checklist

Seven layers, each with a check, a failure signal and an owner. Covers this finding and the six around it.

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Check it yourself first

The Tracking Check tests this point along with all the others, in seconds.

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Asked often

What does a failing "Cookie banner / CMP" check mean?

A cookie banner is the visible half of the consent flow, no CMP means no documented opt-in. Integrate a CMP (Usercentrics, Cookiebot, consentmanager) and enable tag-blocking.

How do you fix a failing "Cookie banner / CMP" check?

Integrate a CMP (Usercentrics, Cookiebot, consentmanager) and enable tag-blocking.

The fix, delivered

Wired up in days, not sprints.

Findings from the Tracking Check go into a ranked sequence with effort estimates in the Audit Sprint, every module with an acceptance criterion.

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