How to Respond to a Lawsuit in Illinois: Answer a Summons (2026)

An answer responds to each numbered paragraph of the complaint by admitting it, denying it, or stating you lack enough knowledge to admit or deny, and then lists your affirmative defenses. Illinois offers a statewide standardized Answer/Response form through the Illinois Courts website. Whatever format you use, the caption must name the circuit court, the parties, and the case number as required by Illinois Supreme Court Rule 131.

File your appearance and written answer with the clerk of the circuit court named in the summons within 30 calendar days of service under Illinois Supreme Court Rule 181(a), counting from the day after you were served. Serve a copy on the plaintiff or the plaintiff's attorney, electronically through the e-filing system under Rule 11(c) where it applies. The filing fee varies by county, and you can request a waiver if you cannot afford it.

Under 735 ILCS 5/2-1301(d), the court can enter a default judgment for want of an appearance or for failure to plead once you miss your deadline. You can file a Motion to Set Aside Default or Motion to Vacate Default Judgment within 30 calendar days of entry under 735 ILCS 5/2-1301(e), which the court may grant on any terms it finds reasonable. Act quickly, because relief gets harder after the 30-day window closes.

Often yes. Parties commonly agree to extend the response deadline, and you can file a motion asking the court for more time before the deadline passes. Filing certain motions directed at the complaint can also change the timeline. Get any extension in writing or on the record, because the 30-calendar-day clock under Rule 181(a) keeps running until the court grants more time or you file your appearance and answer.

You can ask the court to waive your filing fee. Illinois uses the Application for Waiver of Court Fees, and eligibility is based on receiving means-tested public benefits, having income below 125% of the federal poverty guidelines, or showing that payment would cause substantial hardship. If the court grants the waiver, you can file your answer without paying the county filing fee.

Yes. Improper service of process is a recognized defense in Illinois. A defendant can file a motion challenging whether the court has personal jurisdiction because service did not follow the rules. If service was defective, the time to respond may not have started to run. Raise a service problem promptly rather than ignoring the case, because ignoring it still risks a default judgment under 735 ILCS 5/2-1301(d).

Common affirmative defenses include payment, release, satisfaction, discharge, fraud, duress, estoppel, laches, the statute of frauds, and illegality. To assert your own claims against the plaintiff, you can plead a counterclaim. Under 735 ILCS 5/2-608(a), counterclaims in Illinois are permissive, meaning any claim you have against the plaintiff may be pleaded as a counterclaim in your response.

Respond the same way as any civil complaint: file a timely appearance and answer that admits or denies each allegation and raises your defenses. In debt cases, check the 10-year statute of limitations for written contracts under 735 ILCS 5/13-206 and whether the collector sent the validation notice required by the federal Fair Debt Collection Practices Act, 15 U.S.C. § 1692g. Do not ignore the summons, because silence leads to a default judgment for the full amount claimed.

A respondent served with a dissolution petition and summons has 30 calendar days to file an appearance and responsive pleading under Illinois Supreme Court Rule 181(a), counting from the day after service. You file your response with the circuit court using the statewide standardized forms available from the Illinois Courts website. Missing the 30-day window can let the case proceed by default and let the court decide property, support, and parenting issues without your input.