Cal. Civ. Code § 9-211
Service of demand or notice. Any demand may be made or notice served by delivering a written or printed, or partly written and printed, copy thereof to the tenant, or by leaving the same with some person of the age of 13 years or upwards, residing on or in possession of the premises; or by sending a copy of the notice to the tenant by certified or registered mail, with a returned receipt from the addressee; and in case no one is in the actual possession of the premises, then by posting the same on the premises
Operative Text
Service of demand or notice. Any demand may be made or notice served by delivering a written or printed, or partly written and printed, copy thereof to the tenant, or by leaving the same with some person of the age of 13 years or upwards, residing on or in possession of the premises; or by sending a copy of the notice to the tenant by certified or registered mail, with a returned receipt from the addressee; and in case no one is in the actual possession of the premises, then by posting the same on the premises.
Under 735 Ill. Comp. Stat. 5 § 9-211, Illinois law establishes the acceptable methods for delivering a legal demand or notice in a landlord-tenant context. A notice is considered properly served when it is handed directly to the tenant, left with a resident of the premises who is at least 13 years old, sent to the tenant by certified or registered mail with a returned receipt, or — if no one is in possession of the premises — posted on the property itself. The method chosen must match one of these recognized forms for the notice to be legally effective.
Plain English — not legal advice.
Landlords and property managers operating under Illinois law should ensure that any demand or notice required by 735 Ill. Comp. Stat. 5 § 9-211 is delivered through one of the statute's recognized methods: personal delivery to the tenant, leaving the notice with a qualifying resident (age 13 or older) at the premises, sending it via certified or registered mail with a returned receipt, or posting it on the property when no one is in possession. Compliant operators typically retain documentation of the method used — such as a signed receipt, a certified mail tracking record, or a dated photograph of a posted notice — to demonstrate proper service if the matter proceeds to court. Choosing a method not listed in § 9-211 may undermine the legal effectiveness of the notice.
General guidance for property managers — not legal advice for your specific situation. Consult an attorney for advice on your case.
Under 735 Ill. Comp. Stat. 5 § 9-211, tenants have an interest in how a landlord delivers any formal demand or notice, because a notice served through an unauthorized method may not be legally valid. If a tenant believes a notice was not delivered in one of the ways the statute recognizes — such as direct delivery, qualified household member, certified mail with returned receipt, or posting when the unit is vacant — that improper service can potentially be raised as a defense in an eviction or other legal proceeding. Tenants who have questions about whether a notice they received complies with § 9-211 may benefit from contacting a local tenant-rights organization or legal aid office for general information.
General guidance for tenants — not legal advice for your specific situation. Consult a tenant-rights organization or attorney for advice on your case.
Generated September 18, 2026 — auto-generated, not yet human-reviewed. See /transparency for methodology.
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