What it does
`_pin_unauth` assigns an identifier to an unauthenticated browser so the Pinterest Tag can attribute conversions and build audiences without a Pinterest login. `_epik` and `_derived_epik` relate to Pinterest’s enhanced match.
On retail storefronts the tag usually arrives via the Pinterest sales-channel app, so removing it from theme code does not remove it.
What to write in a cookie declaration
Name Pinterest as the provider and describe the purpose as advertising conversion measurement and audience building.
| Field | Value |
|---|---|
| Name | _pin_unauth |
| Provider | |
| Purpose category | advertising |
| Consent category | Marketing |
| Expiry | 1 year (vendor default) |
| Storage | First-party, written by script |
Treat the expiry as indicative
The value above is the vendor’s documented default. Vendors change configuration and several browsers cap script-written lifetimes. Record what repeated scans observe on your own site, with the browser, region, path and interaction state; one run is not authoritative for every visitor.
Can a visitor refuse it?
Yes, in marketing. Where it is installed by a platform app, the app is the thing to configure.
A verification scan supplies runtime evidence for the pages and states it exercises. Test a fresh profile with no choice made, then after refusal, and reconcile observed storage with response headers, server-side integrations and paths the scan did not visit.
Common questions
What is enhanced match?
A feature that hashes and sends customer identifiers to improve attribution. Hashing reduces exposure but does not anonymise, and it deserves its own line in a privacy notice.
Sources and verification
Verified on . Product-behaviour statements were checked against the current implementation and tests. The links below are the verification basis recorded for this article. They support the stated facts, not a legal conclusion for every site or configuration; recheck changing vendor behaviour before relying on it in production.
- Pinterest Business: tag parameters and cookies
Vendor documentation
Checked
See what your own site is loading
A browser scan reports the requests and storage it observed during the sampled journey. Use configured workspace scans to compare the states and pages that matter to your implementation.