California All-Party

Licensing & Regulation

California is one of the most heavily regulated PI jurisdictions in the country. Licensure is administered by the Bureau of Security and Investigative Services (BSIS) within the Department of Consumer Affairs, under Business and Professions Code §7512 et seq. Applicants must be 18+, pass a criminal-history background check (LiveScan), document 6,000 hours of compensated investigative experience (with up to 2,000 hours waivable for law-enforcement or related college credit), pass a two-hour written examination, and pay licensing and exam fees. Attorneys, insurance adjusters, repossessors, and collection agents are partially exempt.

Physical Surveillance

Public surveillance is permitted but constrained by California's strong privacy framework. Article I, Section 1 of the California Constitution guarantees a right to privacy, and case law has applied it to private actors. Drone overflight at low altitudes can trigger civil-trespass claims under People v. Cook and related cases. GPS tracking is criminalized under Penal Code §637.7, which makes it a misdemeanor to attach an electronic tracking device to another person's vehicle without consent, with limited exceptions for the registered owner.

Audio & Video Recording Consent

California is an all-party-consent state under Penal Code §632 (the Invasion of Privacy Act). Every party to a confidential communication must consent to the recording. Flanagan v. Flanagan (2002) made clear that "confidential" turns on whether any party had a reasonable expectation of privacy, not the location. Penalties include $5,000 per violation and treble damages in civil suits. Video-only recording in non-private areas is generally lawful; Penal Code §647(j) criminalizes secret video recording for sexual gratification or in clearly private spaces.

Domestic, Marital & Infidelity Investigations

California is a no-fault divorce state and a community-property jurisdiction. Adultery is rarely directly relevant to property division. However, "marital waste" — dissipation of community assets on an affair — is a recognized doctrine, so PI evidence of expenditure can have value. Investigators must scrupulously avoid recording any private conversations without all-party consent; surreptitious recording is itself a civil tort and can produce evidence that is excluded and a counter-suit.

Cybersecurity, Hacking & Digital Investigations

California has the broadest data-privacy regime in the U.S.: the CCPA/CPRA gives consumers rights over their personal data, and Penal Code §502 (Comprehensive Computer Data Access and Fraud Act) is broader than the federal CFAA. The Stored Communications Act applies. Pretexting financial records is prohibited under both state and federal law. Investigators commonly use commercial aggregators (LexisNexis, IRB, TLO) but must observe DPPA, FCRA, and GLBA. Public social-media posts are fair game; friending a subject under a false identity is pretexting and may violate §502.

Missing Persons, Skip Tracing & Harassment

California's stalking statute (Penal Code §646.9) is one of the most aggressively prosecuted in the country. Persistent surveillance — even of a legitimate subject — that causes the subject to suffer substantial emotional distress can result in criminal exposure. DMV records are tightly controlled under the DPPA and state vehicle code. PIs serving process must be registered process servers in the county of service. Cooperation with local law enforcement is essential in any missing-persons matter.