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Illinois

Was I served correctly in Illinois?

Illinois substituted-service requires leaving copies with a family member ≥13 AND mailing — note the unusually low 13-year-old threshold for the recipient (most states require ≥18). Sheriff service is the default outside Cook County.

Governing rule
735 ILCS 5/2-203, 5/2-204
Read the full rule

Service methods

Personal service

Allowed

In-hand delivery. The default method under 735 ILCS 5/2-203(a)(1).

Substituted service

Allowed

Under 735 ILCS 5/2-203(a)(2): leave a copy at the defendant's usual place of abode with a family member ≥13, AND send a copy by mail to the same address. Both steps required.

Service by mail

Not allowed

Mail service alone is generally not authorized in Illinois. Used only as the second step of substituted abode service.

Service by publication

Allowed

Under 735 ILCS 5/2-206 by court order after diligent inquiry. Newspaper publication once a week for three consecutive weeks.

Electronic service (email/text)

Not allowed

Initial process cannot be served by email in Illinois. After appearance, e-service of subsequent papers is allowed under Supreme Court Rule 11.

Who can serve?

Sheriff or marshal only

Sheriff is the default. Private detectives or court-appointed special process servers may serve in counties with populations over 2 million (Cook County), or by court order elsewhere.

Response deadlines

If you live in-state
30 days
Proof of service required?
Yes

Other states

Not legal advice. Service-of-process rules carry many exceptions for specific case types (eviction, divorce, suit against a corporation, suit against a state agency). If you've been served and think the service was defective, talk to a lawyer about a motion to quash before answering on the merits.