You might think you can save money by digging into someone's background yourself—until you realize how many dead ends, legal minefields, and time sinks you'll hit. The truth is that some investigation work is doable as a DIY project, but knowing where to draw the line separates smart decisions from costly mistakes. Here's what you need to know before you decide whether to investigate on your own or hire a professional.
What You Can Actually Do Yourself
Basic research is within reach for most people. Public records—property deeds, court filings, business registrations, and marriage/divorce records—are genuinely public and often searchable online through county clerk websites or platforms like Ancestry.com. You can spend 2–5 hours combing through these resources at minimal cost (typically $10–30 in document fees).
Social media stalking, while feeling invasive, is completely legal if you're reviewing what someone has posted publicly. LinkedIn profiles, Facebook pages, and public Twitter feeds tell you a lot about someone's stated job history, location, and connections without breaking any rules.
Running a background check through legitimate consumer services like BeenVerified, Spokeo, or TruthFinder (roughly $25–50 for a single report) gives you criminal history, address history, and phone number lookups. These services aggregate public data legally.
Where DIY Breaks Down Fast
The moment you need access to phone records, financial information, surveillance footage from private property, or data that requires a subpoena—you've crossed into territory that requires legal authority and licensing. A private investigator has the credentials, relationships with data brokers, and legal standing to obtain information you simply cannot.
Surveillance also gets complicated quick. Staking out someone's home, following them, or taking photos from someone else's property can constitute stalking, harassment, or trespassing depending on your jurisdiction. An investigator knows the legal boundaries in your state and operates within them; you probably don't.
Interview skills matter too. When you're emotionally invested (because it's your cheating spouse, your business partner, or your custody case), you're more likely to tip your hand, get defensive, or miss critical details. Professionals stay objective and extract information without signaling their intentions.
When to Hire a Professional
If your investigation involves:
- Infidelity verification – Investigators document timelines, locations, and interactions without leaving an evidence trail that compromises divorce proceedings
- Background checks for employment or dating – They dig deeper than free sites, uncovering civil judgments, restraining orders, and sometimes even non-public incidents
- Missing persons or skip tracing – They have access to databases, law enforcement contacts, and geographic knowledge you don't
- Business fraud or embezzlement – They know how to follow financial trails, spot shell companies, and gather evidence admissible in court
- Due diligence before a major financial commitment – Before buying a business or signing a partnership, an investigator can vet someone thoroughly
Cost and Timeline Expectations
Hiring a private investigator typically runs $50–$150 per hour, though some agencies charge flat fees for specific services ($500–$2,000 for background checks, $1,500–$5,000 for infidelity cases). Rush cases cost more. A straightforward background check might take 3–7 days; a surveillance-based investigation could take weeks.
When comparing investigators, ask about:
- State licensing and credentials
- Insurance and bonding
- Specific experience with your case type
- What's included in the quoted price
- Whether they'll testify in court if needed
The Hybrid Approach
You don't have to choose all-or-nothing. Many people do their own public records digging first, then hire an investigator to dig deeper or verify findings. This keeps costs down while ensuring quality where it matters most.
Services like Mercoly let you compare and find trusted private investigators in your area, read client reviews, and understand pricing before you commit—taking the guesswork out of finding the right fit for your situation.
Frequently Asked Questions
Q: Is it illegal to investigate someone myself? Basic research and reviewing public records is legal, but surveillance, accessing private financial records, or impersonation are serious crimes that can result in felony charges.
Q: How do I know if an investigator is licensed? Every state requires licensing; check your state's Department of Public Safety or licensing board website and verify the investigator's number and status before hiring.
Q: Can evidence I gather myself be used in court? It depends on how you gathered it—illegally obtained evidence is inadmissible and can hurt your case, which is why courts prefer work done by licensed professionals.
Ready to find the right investigator for your situation?