#What the signal is, and why most sites miss it
GPC works quietly, in the background. Global Privacy Control is a browser-level setting, built into some browsers directly and available as an extension for others, that transmits a machine-readable signal to every website a visitor loads: this visitor does not want their personal information sold or shared, with no click required on the site itself. The signal is simply present in the visitor's request, the same way a browser reports its language preference.
A website has to be built for this, and detecting the signal does not happen by default. A standard dealer platform template, built primarily around a click-through cookie banner, does not automatically check for it. The two mechanisms, a banner requiring a click and an automated signal requiring none, are separate systems, and a site can build out one fully while never touching the other.
#Which states require this, and what enforcement looks like
Twelve states require this now. As of January 2026, twelve states require recognition of a universal opt-out mechanism or opt-out preference signal, generally satisfied by Global Privacy Control: California, Colorado, Connecticut, Montana, Nebraska, New Hampshire, New Jersey, Minnesota, Maryland, Delaware, Oregon and Texas, among the twenty states with comprehensive privacy laws overall.
California, Colorado and Connecticut have announced a joint investigative sweep specifically targeting businesses that do not honor GPC signals, which signals a coordinated multi-state enforcement posture rather than isolated, one-off actions.
TABLE
States requiring recognition of an automated opt-out signal, as of early 2026
State privacy law changes; verify current status before relying on this for a specific compliance decision.
| Requirement | States (as commonly cited) |
|---|---|
| Comprehensive privacy law in force | 20 states, including California, Colorado, Connecticut, Virginia, Texas and others |
| Requires honoring an automated opt-out signal (e.g. GPC) | California, Colorado, Connecticut, Montana, Nebraska, New Hampshire, New Jersey, Minnesota, Maryland, Delaware, Oregon, Texas |
| Announced coordinated GPC enforcement sweep | California, Colorado, Connecticut |
Compiled 2026-09-13 from public state-privacy-law trackers current as of early 2026; state law changes, verify current status with counsel.
This sits alongside the broader tracking and disclosure questions covered on the dealership website hub, including privacy demand letters and chat widget exposure.