What must a Illinois notice to quit include?
A compliant Illinois notice to quit must include the tenant name (or 'All Occupants'), the property address, a statement that the tenant must vacate, the deadline (5 days for pay-or-quit under 735 ILCS 5/9-209, 10 days for violations under 5/9-210), the statutory language for the specific type of notice (pay-or-quit, cure-or-quit, unconditional), the landlord's name and signature, and the date of service. Missing any element voids the notice and the subsequent eviction filing.
Source: Illinois eviction statute
This is an informational answer based on Illinois eviction statute as of early 2026. It is not legal advice. Housing law changes year to year and local ordinances (especially in rent-controlled or rent-stabilized cities) can override or add to state law. For contested cases, consult a Illinois-licensed attorney.