Licensed Private Detective Agency · Chicago, Illinois · Background Investigations
Background Check Investigator in Chicago
Know who you are really dealing with. A licensed Illinois investigator verifies identity, criminal and civil history, and the records the instant online-search sites get wrong — and delivers a written report you can actually rely on.
Supreme Investigations PLLC is a state-licensed Illinois private detective agency providing background investigations for employers, landlords, attorneys, and private clients across Chicago and Chicagoland. Every check is handled personally by the licensed investigator — never subcontracted. We cross-check multiple sources, verify identity so you are not looking at the wrong person, and document findings in a written report you can rely on.
Licensed by the State of Illinois: Supreme Investigations is licensed by IDFPR under 225 ILCS 447 (Agency #117.001922, Detective #115.002750). Background research is conducted through lawful sources; checks used for employment or tenant-screening decisions are handled in accordance with the federal Fair Credit Reporting Act.
How a Background Investigation Works
You speak directly with Robin Valenzuela. We confirm who you need checked, why, and what the report will be used for, and gather the identifying details that make the research accurate from the start.
We run professional database research and pull primary court and public records across the relevant jurisdictions — criminal history, civil litigation, liens, and more — through legally accessible sources.
We verify identity and address so the record belongs to the right person, and confirm details in the field when a matter calls for it rather than trusting an automated match blindly.
You receive a clear written report with sources documented, delivered by secure channel. For litigation matters the report is formatted for Rule 901 and the investigator is available to testify.
What a Background Check Covers
Verify a candidate, contractor, or vendor before you commit — criminal and civil history, employment and license verification, and FCRA-aware handling for hiring decisions.
Know who you are renting to — identity, eviction and civil history, and records-based verification, handled under the applicable screening and consumer-reporting rules.
Confirm that the person you met online or recently let into your life is who they say they are, before trust, money, or your family is on the line.
Vet the people you trust with your children or aging parents — criminal history, identity verification, and a documented record you can act on with confidence.
Background development on opposing parties, witnesses, and adverse experts for attorneys, with reports formatted for authentication under Rule 901.
Before you sign with a new partner or put money into a deal, verify history, business registrations, litigation exposure, and the claims you are being told.
Background Investigation Services
What You Receive — Clear, Documented Reporting
Why Clients Choose Supreme Investigations
Background Check Pricing
View Full Pricing & Service Rates →
Background Check FAQ
Are private investigator background checks legal in Illinois?
Yes. Supreme Investigations is a licensed Illinois private detective agency (IDFPR Agency #117.001922), and background investigation is a core licensed service under 225 ILCS 447. We research criminal and civil court records, verify identity and history, and document findings through lawful sources. Checks used for employment or tenant-screening decisions are also governed by the federal Fair Credit Reporting Act, and we handle those matters accordingly.
How is this different from an online background check site?
Instant online sites pull from automated databases that are often outdated, incomplete, or simply wrong — and they verify nothing. A licensed investigator cross-checks multiple sources, pulls primary court and public records, confirms identity so you are not looking at the wrong person, and delivers a written report you can rely on and, when needed, defend. You are paying for accuracy and accountability, not a data dump.
How long does a background check take?
Many background investigations are completed within 2–3 business days once we have enough identifying information. More complex matters — multiple jurisdictions, common names, or litigation-grade due diligence — can take longer. We give you a realistic timeline up front and keep you updated throughout.
How much does a background check cost in Chicago?
Background investigations start at $650, which includes database and public-records research, verification, and a written report. The exact fee depends on scope — the depth of research, the number of jurisdictions, and whether field verification is required. The price is confirmed in writing before any work begins, with no hidden fees.
Do you provide background check reports for court or litigation?
Yes. We prepare background and due-diligence reports formatted for attorney review and authentication under Illinois Rule of Evidence 901, with source documentation and a chain of custody when the findings may be entered as evidence. Robin is also available for deposition and trial testimony regarding the methodology and findings.
Supreme Investigations is a licensed Chicago private investigator who handles the whole matter, not just one task. Background-check clients often also need:
Run a Confidential Background Check
Reach the licensed investigator who will personally handle your research — by phone, email, or secure intake. We are available seven days a week across Cook County and Chicagoland.
Supreme Investigations PLLC · Agency #117.001922 · Detective #115.002750 · Licensed by IDFPR under 225 ILCS 447 · Chicago, Illinois · Se habla español