HB 3566: Why Naming a Minor Can Get Your Whole Eviction Dismissed

A small paperwork habit can now blow up your entire eviction. Under Illinois HB 3566, effective January 1, 2026, you cannot name a minor as a defendant in an eviction case — and if you do, the whole case gets dismissed against everyone and sealed. For a law that sounds narrow, the consequences are anything but. Here's the rule and how to file so it never trips you.

What the Law Says

You cannot name as a defendant anyone who is a minor at the time the case is filed, or who was a minor when the lease at issue was entered. If a complaint names such a person:

• The complaint must be dismissed in its entirety against all defendants — not just the minor
• The action is immediately sealed

Why This Matters More Than It Sounds

This isn't a slap on the wrist or a correctable typo. Naming a child as a defendant — even a kid simply listed as an occupant, even by accident — dismisses your whole case against the actual adult tenants and seals the record. You don't get to just drop the minor and continue; you lose the filing and start over while the clock keeps running.

The Penalty

If a minor is willfully and wantonly named as a defendant, they're entitled to reasonable attorney's fees, actual damages, and $1,000 in liquidated damages. So a careless caption can turn into both a dead case and a payout.

How to File Correctly

• Name only the adult tenants and lease signatories as defendants
• Never list children or minor occupants, even though they live in the unit
• Check ages before filing — including whether any person you're naming was a minor when the lease was signed
• For non-lease adult occupants, use "unknown occupants" language rather than listing anyone underage

You can refile against defendants who are properly named, but the court won't waive the refiling fees, and you've lost the time — so it's far cheaper to get the caption right the first time.

The Bigger Picture

HB 3566 is one of several 2026 changes tightening Illinois eviction procedure, and the theme running through all of them is the same: these cases are won and lost on procedure. Between this rule, the strict Cook County eviction process, and a defect-prone 5-day notice, the smallest paperwork mistake can reset you to square one.

For the full picture, see our rundown of all the 2026 Chicago & Illinois landlord law updates.

Key Takeaways

• HB 3566 (effective January 1, 2026) bars naming minors as defendants in an eviction
• It applies if the person is a minor at filing or was a minor when the lease was entered
• Violating it dismisses the entire case against all defendants and seals it
• Willfully naming a minor: attorney's fees + actual damages + $1,000 liquidated damages
• File naming only adult tenants and lease signatories — never list children
• You can refile against proper defendants, but you re-pay fees and lose time