What Does a Private Investigator Actually Do? Services, Limits, and the Law
July 21, 2026
A private investigator legally gathers information and evidence on behalf of clients: conducting surveillance, running background investigations, locating people, interviewing witnesses, analyzing records, and documenting findings in reports that can be used in court. What a PI does not do is equally important: no wiretaps, no hacking, no accessing protected records without authorization, and no arrests. The value of a good investigator is finding the truth through legal means and documenting it so it holds up.
Here is what the work actually looks like, case by case.
What Services Do Private Investigators Provide?
Surveillance. The classic PI work, and still the core of the profession. Licensed investigators conduct covert and overt surveillance, mobile and fixed-location, documenting activity with timestamped video and photographs. Common uses: insurance claims, custody disputes, suspected infidelity, and corporate matters.
Background investigations. Not the automated database checks sold online, but investigator-conducted screening: live interviews with references and former colleagues, credential verification directly with issuing institutions, and multi-jurisdiction court record research.
Locating people. Skip tracing and missing persons work: estranged family, witnesses for litigation, heirs, debtors, and people who simply fell out of contact. Investigators combine public records, databases, OSINT, and field interviews.
Identity verification. A newer but fast-growing specialty: verifying that an online contact is who they claim to be. Catfish and online match investigations check identity, criminal history, and digital footprint before someone meets an online match in person.
Digital forensics. Recovering and preserving electronic evidence from computers, phones, and online accounts, maintained under chain-of-custody standards so it remains admissible.
Fraud and financial investigations. From insurance fraud to embezzlement and corporate fraud examinations, often conducted by credentialed fraud examiners working alongside counsel.
Litigation support. Locating witnesses, taking statements, serving process, gathering evidence, and testifying. Much of a working PI's caseload comes from law firms.
What Can't a Private Investigator Legally Do?
The limits matter as much as the capabilities:
- No wiretapping or recording without consent where the law requires it. Recording laws vary by state between one-party and two-party consent.
- No trespassing. Surveillance happens from places the investigator has a legal right to be.
- No accessing protected records such as bank accounts, phone records, or medical files without proper authorization or legal process.
- No GPS tracking except where the law permits it, which varies by state and vehicle ownership.
- No impersonating law enforcement, and no arrest powers beyond those of any citizen.
Any investigator who offers to work around these limits is offering to hand you evidence you cannot use and liability you do not want.
Do Private Investigators Work With the Police?
They complement law enforcement rather than replace it. Police have powers a PI does not: warrants, subpoenas, arrests. But police resources are finite, and many matters, civil disputes, missing adults, internal corporate issues, employment matters, never reach the threshold for police involvement. That gap is where PIs work. Many investigators, including most of our team, come from law enforcement careers and coordinate with agencies when a private case turns criminal.
When Should You Hire One?
The pattern across every case type: hire an investigator when you need facts you cannot legally or practically gather yourself, and when the outcome matters enough that the facts need to be documented properly. If you are weighing it, two companion guides cover the practical side: how to hire a private investigator and what a private investigator costs.
Encyphir Risk Management is licensed in California and Florida, with licensed investigators available in all 50 states and every U.S. county. If you are trying to figure out whether your situation calls for an investigator, call or text 24/7 at (888) 965-5150 or book a free consultation; we will give you an honest answer, including when the answer is no.
