In the United States, a search warrant is required to compel Google to disclose data stored in a user’s Location History. Since the start of 2018, we have seen a rise in the number of search warrants in the United States that order Google to identify users, based on their Location History information, who may have been in a given area within a certain timeframe. These so-called “geofence” warrants are one subcategory of the total search warrant requests we share in our User Data Requests Transparency Report.
As with all search warrants and data requests, we work to protect the privacy of our users while supporting the necessary work of law enforcement. We carefully review each request to make sure it satisfies applicable laws, and notify users when their identifying information is disclosed in response to a geofence warrant, unless expressly prohibited by law or a court order.
src
https://www.documentcloud.org/documents/21046081-google-geofence-warrants
https://techcrunch.com/2021/08/19/google-geofence-warrants/
As with all search warrants and data requests, we work to protect the privacy of our users while supporting the necessary work of law enforcement. We carefully review each request to make sure it satisfies applicable laws, and notify users when their identifying information is disclosed in response to a geofence warrant, unless expressly prohibited by law or a court order.
src
https://www.documentcloud.org/documents/21046081-google-geofence-warrants
https://techcrunch.com/2021/08/19/google-geofence-warrants/