869 E. Schaumburg Road Suite 376 Schaumburg, IL 60194
Contact Us: 800-960-NSIU (6748)
Insurance Fraud
Investigative services for insurance & risk management professionals to prevent or uncover fraud.
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Private Services
Covert Investigations for divorce, family law, corporate, or other private matters.
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The Leading Private Investigation Firm in the U.S.

National SIU is a private investigation firm offering an array of services to corporate and private clientèle. We produce effective evidence for our clients across the United States and, in some cases, around the world. Our firm is split into two divisions to meet the highly specific needs of our clients: a Special Investigations Unit (SIU) to combat insurance fraud, and a Private Services Division for private and corporate clients.

Our SIU department offers concrete solutions to combat insurance fraud for Workers' Compensation, Disability, Liability, and Property claims with services including surveillance, medical records canvasses, statements, activity checks, alive and well checks, and many others. For over 20 years, these services have produced industry-leading results for our clients.

The Private Services Division caters to personal clients, offering investigations into infidelity, child custody, cohabitation, asset investigation, background checks, and missing persons. It also provides corporate clients with undercover operations, FMLA Investigations, theft investigations, and other unique solutions. Fully licensed and insured, National SIU is the answer for all of your investigative needs.