Use this guide to choose the right complaint path in Illinois when a demand letter deadline passes.
Pick the right agency
Different agencies handle different disputes. Use the list below to find the best fit for your issue.
What to include in your complaint
A clear timeline and documentation make agencies more likely to act quickly.
- Demand letter and delivery proof
- Receipts, contracts, and photos
- Any responses or refusals
What happens after you file
Agencies may request more information, contact the other party, or recommend next steps if the matter is outside their scope.
Where to file complaints in Illinois
| Dispute type | Agency |
|---|---|
| Auto Accident Claims | Illinois Department of Insurance |
| Consumer Refunds | Illinois Attorney General Consumer Protection |
| Contractor Disputes | Local municipalities |
| Debt Collection | Illinois DPR / CFPB |
| Landlord Repairs / Habitability | Illinois Attorney General |
| Property Damage | Illinois Courts |
| Security Deposit | Illinois Attorney General Consumer Protection |
| Unpaid Wages | Illinois Department of Labor |
Agency names change. Confirm current filing options on the agency website.
Illinois complaint FAQ
Where do I file a consumer complaint in Illinois?
Start with Illinois Attorney General Consumer Protection. Include your demand letter, receipts, and any written responses.
Where do I report wage theft in Illinois?
File with Illinois Department of Labor after your demand letter deadline passes.
Who handles tenant or housing complaints in Illinois?
For deposit or repair disputes, contact Illinois Attorney General Consumer Protection or your local housing authority for code enforcement.
Can I still go to small claims after filing a complaint?
Yes. Complaints can build a record, but small claims may still be the fastest way to recover money.
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