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Compiled 11 Nov

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Default tracking cookie identifiers for Extended ID

GA since 6 Jan 2026 notable

Extended ID now uses common tracking cookies like _ga, _ttp and _uetvid by default, boosting visitor identification 5-10% with no setup.

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klaviyo.com Evidence for GA · 6 Jan 2026
Platform
Klaviyo
Capability
Identity resolution · Identity
also: Data collection & tag management
Vendor's name
Default Identifiers For Extended ID
First recorded
Record last updated

Record dates describe acquisition and updates, not human review. About corrections.

Lifecycle history 1 state

  1. GA6 Jan 2026
    First recorded 28 Sep 2026 · recorded from the source history · vendor changelog · klaviyo.com ↗ · archived copy, 26 Oct 2026 ↗

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Identity resolution on other platforms latest first

All Identity resolution changes →

More from Klaviyo in Identity resolution

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