Foursquare Labs Inc., commonly known as Foursquare, is an American technology company. Foursquare's consumer policy says you can request access, correction, deletion, and opt out of the sale/sharing of your data, and it references a 'Privacy Portal' and a 'here' link for submitting requests, but no direct URL appears in the text provided. The reliably documented contact is privacy@foursquare.com (or postal mail to Foursquare Labs, 1160 Battery St, Suite 275, San Francisco, CA 94111). For ad targeting specifically, Foursquare also points to the DAA WebChoices/AppChoices and NAI opt-out tools and says it honors Global Privacy Control browser signals.