A private investigator (PI) is a licensed professional hired to gather information, locate people, conduct surveillance, and uncover facts that are not readily accessible through ordinary means. Private investigation services are used in a wide range of legal, personal, and commercial contexts, from gathering evidence for court proceedings to verifying facts in business due diligence. Understanding what a PI can do legally, what they cannot do, and how to select the right professional for your needs helps ensure that the investigation produces usable results.
At kachina-arc.org you will find a legal and investigative information blog covering private investigation services, surveillance law, and practical guidance for individuals and businesses seeking professional investigation.
What Private Investigators Can Legally Do
Private investigators have the same legal rights as any private citizen when it comes to gathering information. They can observe and record activity in public places, conduct interviews, search publicly available records, and use open-source intelligence techniques. What distinguishes a professional PI from an ordinary person is their training, their access to specialized databases, their experience interpreting what they find, and their ability to present evidence in a way that will be useful in legal proceedings.
Surveillance of individuals in public places is one of the most common PI activities. A PI can follow a subject, photograph them in public locations, and document their activities and associations. This is entirely lawful because there is no reasonable expectation of privacy in public spaces.
Background investigations draw on a range of public and commercial databases to build a picture of an individual or organization: court records, corporate filings, property ownership records, social media, and licensed databases that aggregate publicly available information. These investigations are used in employment screening, due diligence on business partners, and personal background checks.
Missing person investigations locate individuals who have lost contact with family or creditors. Techniques include social media research, database searches, interviews with known associates, and physical surveillance once a location is identified.
Fraud investigations gather evidence of financial misconduct, insurance fraud, or workplace dishonesty. In insurance contexts, PIs are frequently retained to investigate suspicious claims, documenting whether claimants are engaged in activities inconsistent with their alleged injuries or limitations.
What Private Investigators Cannot Do
Professional PIs work within the law and are bound by the same legal restrictions as anyone else. Understanding these limits ensures that the evidence gathered will be usable in legal proceedings and that the client is not exposed to civil or criminal liability from their investigator’s conduct.
Trespassing onto private property to gather surveillance footage is not permitted. A PI who enters private land without permission is committing trespass regardless of their professional status. Evidence obtained through trespass may be inadmissible in court and exposes the investigator and client to civil liability.
Accessing private electronic communications (emails, text messages, private social media accounts) without authorization is a criminal offense in most jurisdictions under computer fraud and electronic surveillance laws. A PI who hacks into accounts or intercepts private communications is committing a crime.
Impersonation of law enforcement, government officials, or other individuals to obtain information is unlawful. Pretexting (misrepresenting identity to extract information from third parties) is restricted by law in many jurisdictions, particularly in financial contexts.
Recording conversations is subject to varying rules by jurisdiction. In some places, recording a conversation requires only one party’s consent (the person doing the recording). In others, all parties must consent. A PI operating across jurisdictions must understand which recording rules apply.
When Do You Need a Private Investigator?
Several circumstances commonly lead individuals and businesses to retain a PI:
Infidelity investigations are among the most emotionally charged assignments. A spouse who suspects a partner of infidelity may retain a PI to gather documented evidence of the relationship, particularly where divorce proceedings may be affected by proof of adultery. A PI can conduct surveillance that documents meetings, contacts, and behavior without the investigating spouse having to rely on instinct or accusations.
Child custody disputes sometimes require documented evidence of a co-parent’s behavior, living arrangements, or fitness as a parent. A PI can observe and document activities that are relevant to custody hearings, providing objective evidence that is more persuasive than the testimony of a party with an obvious interest in the outcome.
Business due diligence before entering a partnership, investment, or significant commercial relationship benefits from professional verification of claims made by the other party. A PI can verify that representations about business history, assets, and personal background are accurate.
Legal proceedings of all kinds can benefit from PI-gathered evidence: locating witnesses, serving documents on people who are evading service, investigating opposing parties’ activities, and verifying facts that are in dispute.
How to Choose a Private Investigator
Licensing is the first criterion. Most jurisdictions require PIs to be licensed, and the requirements typically include background checks, training or experience requirements, and ongoing professional standards. Verify that any PI you retain is properly licensed in the jurisdiction where the investigation will be conducted.
Experience in the relevant type of investigation matters. A PI who specializes in corporate fraud may not be the right choice for a domestic surveillance assignment, and vice versa. Ask specifically about the PI’s experience with cases similar to yours and how many they have handled.
Transparency about methods is essential. A PI who is unwilling to explain how they will gather information, or who suggests methods that sound legally questionable, is not someone you should retain. Evidence gathered through unlawful means may be inadmissible and could expose you to legal liability.
Written agreements defining the scope of the investigation, the fees, the reporting arrangements, and the delivery of findings protect both parties. A professional PI will provide a clear written agreement before any work begins.
Confidentiality is fundamental. The PI must commit to keeping the investigation confidential, not disclosing your identity or the subject of the investigation to third parties, and handling any personal data gathered in accordance with applicable privacy laws.
