Laws and limits
What Private Detectives Can and Cannot Do Legally
Private detectives work within the same laws as everyone else, plus licensing rules. Knowing the limits protects you and your case.
Key points
- detectives can research records, observe in public and interview
- detectives can't hack, trespass, wiretap or impersonate police
- Methods matter as much as results
What detectives can do
- Search public and lawfully available records
- Observe and video people in public places
- Interview willing witnesses
- Review publicly visible online content
- Locate people and assets through lawful sources
- Testify about their work
What detectives can't do
- Hack or access private accounts, email or phones
- Obtain phone or bank records by pretext (federal law prohibits it)
- Wiretap or record conversations in violation of state law
- Trespass or enter private property without permission
- Impersonate police or government officials
- Place tracking devices where the law doesn't allow it
Gray areas depend on state law
Recording consent, tracking devices and some data access rules vary by state. See recording laws and tracking.
Why it matters to you
Unlawfully obtained evidence can be excluded, and the person who hired the detective can face liability. Lawful methods protect you.
Common questions
Can a detective run my license plate?
Access to motor vehicle records is restricted by the federal Driver's Privacy Protection Act to permissible purposes.
Can a detective get someone's phone records?
Not by pretext; federal law prohibits it. Records may be obtained through legal process.
Can a detective enter a building?
Only where the public is allowed or with permission.
This guide is general information, not legal advice. Laws change and vary by state; consult an attorney about your situation. See our legal disclaimer.
Related services
Services connected to this guide.
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Keep reading
Related guides.
What Is Pretexting, and Why Is It Illegal?
What pretexting is, which federal laws prohibit it for phone and financial records, and why reputable detectives refuse to do it.
Laws and limitsCan a Private Detective Get Into Someone's Social Media?
What private detectives can and can't do with social media: public content, fake friend requests, private accounts, and lawful capture for evidence.
Laws and limitsPrivate Detectives and Trespassing: Where the Line Is
Where private detectives can and can't go: public places, private property, businesses open to the public, and expectations of privacy.
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