Hiring a private investigator for the first time can feel unfamiliar. Most people only consider it when something important is at stake — a legal case, a missing person, a business dispute, or concerns about fraud. The good news is that California regulates the profession tightly, so a little due diligence goes a long way.
This guide explains how to hire a licensed private investigator in California, what to ask before you sign anything, and what a PI can and cannot do under state law.
1. Verify the license first
Under the California Business and Professions Code, anyone who conducts investigations for hire must hold a current private investigator license from the Bureau of Security and Investigative Services (BSIS). The easiest way to confirm this is to ask for the license number and check it on the BSIS license lookup page.
A licensed investigator must also display the business name, address or phone number, and license number in any advertisement or solicitation — including websites, business cards, and brochures. If that information is missing or hard to find, treat it as a red flag.
At Active Investigators, our license number is CA PI #189764 and our contact details are listed on every page.
2. Ask about experience in your specific type of case
Investigators often specialize. Someone who excels at corporate due diligence may not be the right fit for a sensitive family matter, and vice versa. Before you hire, ask:
- Have you handled cases like mine before?
- What does your process typically involve?
- How do you document findings?
- What kind of report will I receive at the end?
The answers should be clear, realistic, and free of guarantees. Under California law, no investigator can promise a specific outcome, and ethical ones will not.
3. Understand what a PI can and cannot do
California law defines the work a licensed private investigator may perform. That includes gathering information about a person’s identity, habits, movements, reputation, or character; locating lost or stolen property; and collecting evidence for legal proceedings.
However, there are firm lines:
- A PI cannot impersonate law enforcement.
- A PI cannot trespass, break into property, or illegally access records.
- A PI cannot tap phones, intercept communications, or conduct covert GPS tracking without proper legal authority and consent from the vehicle owner or lessee.
- A PI cannot promise specific results.
If an investigator suggests any of the above, walk away. Hiring someone who breaks the law can expose you to liability and undermine any evidence they collect.
4. Discuss scope, timeline, and fees in writing
A professional investigator will explain how billing works before work begins. That may include hourly rates, flat fees, retainer amounts, and expenses such as database access, travel, or court appearances. Make sure the scope of work is described in writing so both sides understand what is — and is not — included.
Also ask about timing. Some checks take a few hours. Complex investigations can take weeks. An honest investigator will give you a realistic estimate rather than a rushed promise.
5. Confirm confidentiality and communication practices
Confidentiality is central to investigative work. Ask how your information will be stored, who will have access to it, and how you will receive updates. Some clients prefer written reports; others want periodic phone updates. Agree on a communication rhythm upfront.
6. Meet or consult before committing
Many investigators offer an initial consultation. Use it to judge professionalism, clarity, and whether you feel comfortable sharing sensitive details. Trust matters. If something feels off, consult another licensed firm.
What to bring to your first meeting
To move quickly and avoid wasted effort, gather relevant documents ahead of time:
- Any court orders, contracts, or legal notices related to the matter
- Names, addresses, phone numbers, or known associates
- Photos, timelines, or prior reports
- A clear description of what you hope to learn or prove
The more focused you are, the more efficient the investigation can be.
Common reasons people hire a PI in California
- Legal support: locating witnesses, gathering admissible evidence, serving hard-to-find defendants
- Background research: vetting business partners, tenants, caregivers, or romantic interests
- Fraud and identity theft: documenting suspicious activity for law enforcement or court proceedings
- Missing persons: reconnecting with estranged family or tracking down debtors through legal skip tracing
- Corporate due diligence: verifying a company’s reputation, ownership, and public record history before a deal
Not every situation requires an investigator. Sometimes a public records search or attorney consultation is the better first step. A reputable PI will tell you when hiring one is not the right move.
Final thought
Hiring a private investigator in California comes down to three things: verify the license, confirm the scope, and trust your instincts. A licensed, experienced investigator will answer your questions directly, work within the law, and keep your information confidential.
If you are considering hiring an investigator, learn more about our services or contact us for a confidential consultation. Active Investigators is licensed in California as CA PI #189764, based in Pasadena, and serves clients throughout the state.