Illinois Custody Fraud

The Problem in Illinois

Illinois processes tens of thousands of custody cases annually, with Cook County alone handling a massive volume. While Illinois law requires proper notice, service fraud continues to leave parents unaware of proceedings affecting their children.

Illinois allows service by publication when a defendant cannot be found after "due inquiry." The subjectivity of what constitutes "due inquiry" creates vulnerabilities that bad actors exploit.

Illinois Service of Process Requirements

Under 735 ILCS 5/2-206, service by publication requires an affidavit stating the defendant cannot be found after diligent inquiry. The court must approve publication service before it can proceed.

Illinois allows petitions to vacate default judgments under 735 ILCS 5/2-1401 for various grounds including fraud and lack of proper service. Generally, petitions must be filed within two years of the judgment.

Service of Process Laws in Illinois

Illinois law establishes specific requirements for serving process in civil cases, including family law matters. Under 735 ILCS 5/2-203, service must be made by a person who is at least 18 years old and is not a party to the action. Personal service — handing the documents directly to the defendant — is the primary method under 735 ILCS 5/2-203(a). Illinois also allows service by leaving a copy at the defendant's usual place of abode with a family member or person residing there who is at least 13 years old, and informing that person of the contents.

When personal and abode service cannot be accomplished, 735 ILCS 5/2-206 permits service by publication. The party seeking publication must file an affidavit stating that the defendant "on due inquiry cannot be found, or is concealed within this State, so that process cannot be served upon him or her." The court must then enter an order directing service by publication. The notice must be published once per week for three consecutive weeks in a newspaper published in the county where the action is pending. A copy of the notice must also be sent by mail to the defendant's last known address within 10 days of the first publication.

Illinois also recognizes service by special order of court under 735 ILCS 5/2-203.1, which gives judges flexibility to authorize alternative methods of service when traditional methods have failed. This can include service by email or social media in appropriate circumstances, though courts have been cautious in approving these methods for family law cases where parental rights are at stake.

How to Challenge a Default Custody Judgment in Illinois

Remedy: Section 2-1401 Petition for Relief from Final Judgment

Governing law: 735 ILCS 5/2-1401, 735 ILCS 5/2-1301(e), 735 ILCS 5/2-203 et seq.

A petition for relief from final judgment may be filed after 30 days from entry of judgment. Must be filed within 2 years (time during which fraud was concealed is tolled). The petitioner must show: (1) a meritorious defense, (2) due diligence in presenting the defense in the original action, and (3) due diligence in filing the petition.

Important: Illinois expressly abolishes bills of review and coram nobis — § 2-1401 is the exclusive remedy. The petition is filed in the same proceeding but is treated as a new action. A void judgment (lack of jurisdiction due to defective service) may be challenged at any time with no time limit — but whether the judgment is void is the contested question, not the deadline. How to read that.

Custody cases: The statute specifically references the Illinois Parentage Act of 2015 as a carve-out, meaning parentage and custody cases may have specialized procedural rules that interact with § 2-1401.

Within 30 days of entry, 735 ILCS 5/2-1301(e) provides an easier standard — the court has broad discretion to vacate upon a showing of reasonable cause.

Service of process: 735 ILCS 5/2-203 et seq. requires personal service. Service by publication under § 2-206 requires a sworn affidavit that the defendant's whereabouts cannot be ascertained with due diligence.

For comparison with how this process works in Texas, see our documented case study and guide to filing complaints.

Relevant Illinois Statutes

735 ILCS 5/2-203 — Service of process requirements, including personal service and abode service procedures.

735 ILCS 5/2-206 — Service by publication, including the affidavit requirement, court order, and publication procedures.

735 ILCS 5/2-1301(e) — Motion to vacate default judgment within 30 days of entry.

735 ILCS 5/2-1401 — Relief from judgment after 30 days, with a general two-year limitation period (no time limit for void judgments).

Read that the way you would read it in Texas. Whether the judgment is void is the contested question, not the deadline. Where the record looks regular on its face — a return of service reciting valid service — proving otherwise takes evidence from outside the record, and that route usually does have a deadline. Treat the no-time-limit rule as a fallback argument, not a schedule.

750 ILCS 5 (Illinois Marriage and Dissolution of Marriage Act) — Governs divorce, legal separation, allocation of parental responsibilities (custody), and parenting time.

750 ILCS 5/602.7 — Allocation of parenting time, including the factors courts must consider in determining the child's best interests.

750 ILCS 5/602.5 — Allocation of significant decision-making responsibilities (legal custody) between parents.

How to Get Help in Illinois

Illinois Courts Self-Help: The Illinois courts system provides self-help resources including standardized forms and instructions for family law matters. Visit illinoiscourts.gov/self-help for forms and guidance on filing motions to vacate default judgments.

Illinois State Bar Association Lawyer Finder: The ISBA operates a lawyer referral service to connect individuals with attorneys experienced in family law. Visit isba.org/public/lawyerfinder or call 800-922-8757 for a referral.

Illinois Legal Aid Online: This organization provides free legal information, forms, and a directory of legal aid providers throughout Illinois. Visit IllinoisLegalAid.org for self-help guides on family law topics including challenging default judgments.

Cook County Legal Aid: For residents of the Chicago area, the Legal Aid Society of Metropolitan Family Services (312-986-4200) and Chicago Volunteer Legal Services (312-332-1624) provide free legal assistance in family law matters to qualifying individuals.