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National SIU


National Special Investigations Unit (NSIU) is a leading agency amidst nationwide investigation agencies; specializing in insurance fraud investigation, infidelity investigation, cohabitation, civil investigations and even criminal investigations. We are amongst the top private investigations firms in the country. Our investigators are equipped with state of the art technology and trained for challenging cases, and it is the quality of service that we provide, that separate us from other investigation companies.

Our services as a surveillance company are highly client centric, and our customers are always our priority. Each investigation is catered to achieving the most definitive, court ready results completed in a timely manner.

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

National Special Investigations Unit Discusses Spring/Summertime Crime Rates & Surveillance

National Special Investigations Unit Discusses Spring/Summertime Crime Rates & Surveillance

SCHAUMBURG, ILLINOIS, - The team at National Special Investigations Unit (NSIU) has issued an advisory for Spring/Summer 2017 season.According to NSIU, spring and summer are prime times for both crimes against property and individuals (, and the best way to…


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