National Investigations, Inc. Has over 69 years combined experience in residency investigations and is the leading residency investigations company in Illinois.


Read more about our Residencency Investigations...

Investigation Services


Browse through all our services to see how we can help you!

All investigations will be conducted within the compliance of the law to avoid entrapment, invasion of privacy, misrepresentation, and trespassing. Our fees will remain within your specific budget. There will never be any fee for consultations. Our investigators will be available to testify in front of a judge, jury, hearing or an arbitrator.

Residency Investigations

We are one of the top residency investigation corporations in Illinois. We have saved our districts millions of dollars in just the past 2 years... Learn More.

Video Surveillance

Can it work for you?  Yes we get you the proof you need to fight fraudulent claims… Learn More.

Investigations Requests

Use our secure investigations request form that you can fill out and fax.  This will help you start any type of case that you have to submit. . . .Learn More.

Background Checks

National Investigations, Inc. strives to get you accurate and timely results.  We only use flat-rate, affordable, pricing.  One myth we want to break is that there is no such thing as a national background check unless you go through the FBI with fingerprint cards . . .Learn More

Nanny Checks

Did you know that 10% of background checks performed on childcare providers turn up something alarming?  Things such as shoplifting, drunk driving, and drug abuse show up daily!.  . .Learn More.

Worker's Compensation Claims

Provide investigative excellence to insurance carriers.  Our investigative services, which include casualty surveillance, background checks, and activities’ checks, have helped thousands of adjusters and defense attorneys.  . . . .Learn More.