What is the _pin_unauth cookie?
Registers a unique ID that identifies and recognizes the user. Is used for targeted advertising.
Our October 2026 scan found it on 15 sites (1% of the 2,450 we scanned), set before any consent.
- Purpose
- Advertising
- Belongs to
- Set as
- First-party (under the site's own domain)
- Typical lifetime
- 12 months (vendor says: 1 day) — longer than the vendor documents
Sites that set _pin_unauth before consent
The highest-ranked 15 of 15 sites.
- usps.com24 tracking companies
- fastcompany.com17 tracking companies
- aarp.org30 tracking companies
- intelbras.com.br10 tracking companies
- ning.com10 tracking companies
- hepsiburada.com6 tracking companies
- dish.com18 tracking companies
- teacherspayteachers.com5 tracking companies
- poshmark.com9 tracking companies
- thestar.com17 tracking companies
Show 5 more sites
- netshoes.com.br15 tracking companies
- ana.co.jp16 tracking companies
- ebay.com.au7 tracking companies
- joom.com3 tracking companies
- washingtontimes.com21 tracking companies
Related cookies
Other cookies from Pinterest.
- _pinterest_ct_ua12 sites
How to stop it
Declining non-essential cookies in a site's consent banner should stop _pin_unauth being set on later visits. Blocking third-party cookies in your browser settings stops the third-party kind everywhere, and clearing cookies for a site removes any it already set.
Description from the Open Cookie Database (Apache 2.0).
Understanding this page
- How cookie lifetimes work, and why a 13-month _ga matters
What a cookie's "expires" field actually controls, why Google Analytics ships a 2-year default that many sites cut down to 13 months, and how Safari's 7-day cap on script-set cookies changes the picture.
- First-party vs third-party cookies (and why "first-party" still tracks you)
What the distinction actually means technically, why browsers only block one of the two, and how CNAME cloaking, server-side tagging and cookies like _ga let sites keep tracking under their own domain.
- How to block or limit trackers
Browser privacy settings, content blockers, Global Privacy Control and clearing cookies compared honestly — what each one actually stops, what it doesn't, and what it costs you in return.