Official sources
Licensing authorities and governing law for private investigators in the three states we cover. We link to the government source rather than summarizing it.
Links checked October 15, 2026. If one breaks, tell us at contact@uscli.org.
| State | Licensing authority | Governing statute |
|---|---|---|
| Illinois | Department of Financial and Professional Regulation: Private Detective | 225 ILCS 447, Private Detective, Private Alarm, Private Security, Fingerprint Vendor, and Locksmith Act of 2004 |
| Indiana | Professional Licensing Agency: Private Investigator & Security Guard | See the licensing agency page for current statutes and rules |
| Wisconsin | Department of Safety and Professional Services: Private Detective | Wis. Stat. § 440.26 |
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