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ARTICLE · 30 JANUARY 2026

French CNIL Provides Guidance On Cross-Device Cookie Consent

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How and when to get consent for cross-device tracking has been a worry for many companies subject to GDPR and similar regimes.

United StatesPrivacy
Liisa Thomas
Liisa Thomas
Kathryn Smith
Kathryn Smith
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How and when to get consent for cross-device tracking has been a worry for many companies subject to GDPR and similar regimes. The French data protection authority, CNIL, adopted recommendations about this practice in 2020, and has just updated those recommendations to provide greater detail and more examples and use cases for multi-device consent.

The guidance applies narrowly to situations where users are logged into their account. Namely, where a logged-in user exercises a choice about cookies on one device and the company applies that choice when the user is logged into their account on another device. If the company takes this approach, the guidance stresses that such multi-device consent meet several criteria:

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