The United States is one of the most active markets for reverse face search, used for everything from online dating safety to fraud prevention and missing persons cases. But because there is no single federal law governing the practice, the rules depend on where you live, where the subject lives, and how you use the results. This guide explains the legal landscape and best practices for American users. For the broader concept, see our complete guide to reverse face search.
Is Face Search Legal in the US?
There is no federal law in the United States that bans reverse face search. Because the images these tools analyze are already published publicly online, searching them is generally treated as lawful. The legal complexity comes from state-level biometric privacy laws and from how results are used. A handful of states impose strict consent requirements on companies that collect facial data, which shapes which services operate there and how. For the international legal framework, our legality FAQ provides broader context.
First Amendment and Public Information
US courts have repeatedly held that collecting and using publicly available information is protected under the First Amendment. Face search tools simply automate what a person could do manually by looking at public photos, so the act of searching is generally not restricted. That said, constitutional protections do not shield uses that violate other laws, such as harassment, stalking, discrimination, or invasion of privacy. The First Amendment protects the search; it does not protect harmful actions taken with the results.
Illinois BIPA
Illinois's Biometric Information Privacy Act (BIPA) is the strictest biometric law in the US. It requires companies to obtain written consent before collecting biometric identifiers, including face geometry, and it allows individuals to sue for violations. BIPA has led to major lawsuits against companies that collected facial data without consent. While BIPA primarily targets businesses rather than individual users, it means services operating in Illinois must handle facial data carefully — and users should choose tools that delete uploads promptly to stay on the safe side.
Texas CUBI and Washington State Law
Texas's Capture or Use of Biometric Identifier (CUBI) law and Washington's biometric privacy statute also regulate the collection and use of biometric data, though they are enforced by the state attorney general rather than through private lawsuits like BIPA. Both require consent and reasonable retention practices. Other states, including California under CCPA and CPRA, New York, and Colorado, have added their own privacy protections. The result is a patchwork where the same search may face different rules depending on where the user and subject are located.
Popular Use Cases in the US
- Online dating safety — verifying a match's photos before meeting
- Background checks and identity verification
- Fraud prevention and romance scam detection
- Finding missing persons or lost family members
- Detecting photo theft and unauthorized use of your own image
- Journalistic research and due diligence
Tips for US Users
- Use services that delete your uploaded photo immediately after search
- Always have a legitimate purpose before searching
- Avoid using results to stalk, harass, or discriminate
- Be mindful of state-specific biometric laws, especially in Illinois and Texas
- Cross-check results, as different tools index different sources
State-by-State Considerations
If you are in Illinois, Texas, Washington, or California, biometric privacy laws are strongest, so choosing a tool with clear deletion practices is especially important. In most other states, face search is broadly permitted for legitimate purposes, but you should still avoid harmful uses and respect the subject's privacy. For a practical workflow, see our step-by-step guide to reverse face search, and for verifying someone safely before meeting, read our guide on how to verify someone's identity before meeting in person.