How to File a Complaint Against an Auto Insurance Company in Illinois

Understanding the Complaint Process

When you believe an Illinois auto insurance company has acted unfairly—whether through denied claims, unjust rate hikes, or misleading policies—you can formally lodge a complaint with the state's Department of Insurance (DOI). The DOI reviews complaints, investigates potential violations, and can impose penalties or require corrective actions.

Who Can File a Complaint?

Any Illinois resident who has paid or intends to pay for auto insurance, or who has a claim pending with an insurer, is eligible to file. The complaint can be made online, by mail, or in person.

Gathering Required Information

Before filing, collect:

• Insurance policy number and company name
• Date and details of the incident or claim denial
• Correspondence with the insurer (emails, letters, phone logs)
• Proof of payment (bank statements, credit card receipts)

Filing the Complaint Online

The DOI offers an electronic filing system. Follow these steps:

• Visit Illinois DOI Complaint Portal.
• Create an account or log in.
• Choose "Auto Insurance" as the policy type.
• Fill out the form with accurate details.
• Upload supporting documents.
• Submit and note the reference number.

Filing by Mail or In Person

Download the PDF complaint form from the DOI website, print, and sign. Mail to:

Illinois Department of InsuranceAttn: Consumer Complaint Unit400 N. 6th Street, 6th FloorChicago, IL 60602

Or visit any DOI office; the current list is on the website.

Timeline and Expected Outcomes

After submission, the DOI will:

• Confirm receipt within 5 business days.
• Assign a case number and investigator.
• Conduct an investigation; this may take 30–90 days depending on complexity.
• Issue a decision or request additional information.

What Happens After the Investigation?

Possible outcomes include:

• Reimbursement of denied claim.
• Restoration of coverage.
• Financial penalty to the insurer.
• No action if the insurer complies with regulations.

Tips for a Strong Complaint

• Be concise and factual. Avoid emotional language.

• Attach clear evidence: photos, receipts, and logs.

• Keep copies of all correspondence.

• Follow up every 30 days if you haven't heard back.

Alternative Dispute Resolution

If the DOI's decision is unsatisfactory, you can:

• File a lawsuit in state court.
• Request mediation through the Illinois Attorney General's Office.

Key Contacts and Resources