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Illinois Eviction Complaint (08/20), page 1
Basic · 44/100Form Complexity Index

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What this form asks for

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The Illinois Eviction Complaint is an official court document used to begin a formal eviction lawsuit in the state of Illinois. A landlord or property owner (the Plaintiff) files this form to state their legal right to a property and explain why the current occupants (the Defendants) should be removed, such as for non-payment of rent or lease violations. Today, this form can be filled out quickly and accurately using AI-powered services like Instafill.ai, which can also convert non-fillable PDF versions into interactive fillable forms.
Fillable fields44
Pages2
Sections10
Questions that depend on earlier answers13
Form Complexity IndexBasic, 44/100

The AI checks your answers before you download

15 checks built for this form, so a wrong date or a missing answer is caught before anyone else sees it.

Ensures Plaintiff Name is Provided

This check verifies that the 'Plaintiff — Name' field is not empty. The plaintiff's name is a fundamental requirement for legal filings to identify the party bringing the action. A missing plaintiff name would render the complaint legally deficient and lead to its rejection by the court clerk.

Validates Completeness of Property Address

This validation ensures that the 'Property Address 1 - Full Address' field, including street, city, state, and ZIP, is completely filled out. A complete and accurate address is critical for the court to have jurisdiction and for the sheriff to execute any resulting eviction order. An incomplete address will cause the case to be delayed or dismissed.

Requires at Least One Reason for Eviction

This check confirms that at least one checkbox from section 2 (2a, 2b, 2c, 2d, or 2e) is selected. The form requires the plaintiff to state the legal grounds for the eviction. Failing to select a reason means the complaint does not state a valid cause of action and will be rejected by the court.

Validates Nonpayment of Rent Details

This rule checks that if box '2a. I ended (terminated) the lease for nonpayment of rent' is checked, then the 'Lease termination start date', 'Lease termination end date', and 'Amount of rent owed' fields are all filled. These details are necessary to substantiate the claim of nonpayment. Missing information will weaken the legal argument and may lead to the dismissal of the nonpayment claim.

Verifies Date Format and Chronology for Unpaid Rent

This validation ensures that the start and end dates provided in section 2a are in a valid date format (e.g., MM/DD/YYYY). It also checks that the 'Lease termination end date' is on or after the 'Lease termination start date'. This logical consistency is crucial for defining a clear and valid period of owed rent, and incorrect dates could invalidate the claim.

Ensures Lease Violation Explanation is Provided

This check verifies that if box '2c. I ended (terminated) the lease because Defendants violated the terms' is checked, the corresponding explanation text field is not empty. The court needs a specific description of the alleged violation to evaluate the claim. Without an explanation, the claim is unsubstantiated and will likely be dismissed.

And 9 more checks
  • Validates Defendant Identification
  • Ensures Logical Consistency of Document Attachments
  • Verifies Required Attachments are Indicated
  • Confirms Lease Attachment for Lease Violation Claims
  • Validates Format of Monetary Amount Fields
  • Ensures All Signatory Information is Complete
  • Validates Format of Plaintiff's Contact Information
  • Validates Past Due Rent Amount When Claimed
  • Ensures County is a Valid Illinois County

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How to Fill Out E-C 3502.1 Online for Free in 2026

What the AI walks you through.

  1. Navigate to Instafill.ai and upload or select the Illinois Eviction Complaint form.
  2. Use the AI assistant to accurately input the Plaintiff (landlord) and Defendant (tenant) names and contact information.
  3. Enter the full address of the property subject to the eviction.
  4. Check the boxes that correspond to the legal reasons for the eviction, providing details like amounts of unpaid rent or descriptions of lease violations.
  5. Indicate any additional demands, such as past-due rent or attorney's fees, and specify which supporting documents (like the lease or eviction notice) are attached.
  6. Review all the information populated by the AI for accuracy, then provide your digital signature and contact details.
  7. Download the completed, signed Eviction Complaint, ready for filing with the appropriate Illinois Circuit Court.

Common Mistakes in Completing E-C 3502.1

The ones the AI is built to catch.

Failing to Name All Occupants or Check 'Unknown Occupants'
Landlords often only list the primary tenant on the lease, forgetting other adult residents or not knowing their names, and frequently overlook the 'Unknown Occupants' checkbox. This is a critical error because an eviction order is only valid against the parties named in the complaint; if 'Unknown Occupants' is not checked, the sheriff cannot legally remove anyone not explicitly listed, leading to a failed eviction and the need to start the process over. To avoid this, list the full legal names of all known adult occupants and always check the 'Unknown Occupants' box to cover any residents whose names you do not know.
Incorrect or Incomplete Property Address
A simple typo or omitting the unit/apartment number in the property address (Section 1) is a common mistake made in haste. An incorrect address can lead to the complaint being dismissed for being legally insufficient or cause major issues with serving the summons and executing the eviction order, as officials may be unable to identify the correct premises. Always double-check the full address, including the unit number, city, and ZIP code, to ensure it is identical to the address on the lease and notice.
Vague or Legally Insufficient Explanation for Lease Violation
When checking box 2c for a lease violation, plaintiffs often provide a vague reason like 'being a nuisance' without specifics. A judge requires a clear, factual description of how the lease was violated, referencing the specific clause if possible. A vague explanation is not legally sufficient and will likely result in the case being dismissed, forcing the landlord to refile. To prevent this, clearly state the specific actions, dates, and lease terms that were violated.
Inconsistent Past-Due Rent Amounts
The form asks for the amount of rent owed in Section 2a and again in Section 3. It's common for filers to enter different amounts in these two sections or to fill in one but not the other. This inconsistency creates confusion and can weaken the plaintiff's claim for damages, potentially leading the court to question the accuracy of the entire filing. To avoid this, calculate the total past-due rent carefully and ensure the exact same dollar amount is entered in both Section 2a and Section 3.
Forgetting to Request Rent Accrued During the Case
Landlords often focus on the 'Past due rent' they are currently owed and forget to check the box for 'Rent due through the date of judgment' in Section 3. The eviction process takes time, and rent will continue to accrue during this period. Failing to check this box means the final judgment may not include rent that becomes due during the court proceedings, resulting in significant financial loss. Always check this box to recover all possible rent up to the day the judge makes a decision.
Attachment Errors and Mismatched Checkboxes
Section 4 requires the plaintiff to indicate which documents are attached, and the 'Demand or Notice' is almost always required. A frequent and serious error is failing to attach the required documents or checking boxes for documents that are not included. Without the required notice, the case is invalid and will be dismissed, wasting time and filing fees. Carefully review Section 4, ensure all required documents are physically attached, and check the corresponding boxes accurately. AI-powered tools like Instafill.ai can help by creating checklists based on form selections to ensure all necessary attachments are prepared.
Improper Plaintiff Identification
The plaintiff must be the legal owner of the property or the landlord entity named on the lease (e.g., 'ABC Properties, LLC'). A property manager or agent might mistakenly list their own name instead of the legal owner's. This can lead to the case being dismissed for lack of standing, as only the party with the legal right to possession can sue for eviction. Ensure the name listed as 'Plaintiff' is the correct legal entity or individual who owns the property.
Missing Signature or Invalid Contact Information
Forgetting to sign the form (or type the name for e-filing) renders the complaint invalid. Additionally, providing an old or rarely checked email address is a major risk, as the court will use it for official communication, including hearing dates. Missing these communications can lead to your case being dismissed. Always sign the form as instructed and provide a current, regularly monitored email address and phone number.
Filing in the Wrong County
The complaint must be filed in the Circuit Court of the county where the rental property is physically located. Landlords sometimes mistakenly file in the county where they live or their business is based. Filing in the wrong jurisdiction will cause the case to be dismissed, forcing the plaintiff to pay new filing fees and start over in the correct county. Always verify the county of the property address and enter that name at the top of the form.
Omitting or Using Incorrect Dates for Rent Owed
In section 2a, which deals with non-payment of rent, the form requires a specific period (from date to date) for which rent is owed. Filers often leave these dates blank or enter them incorrectly, which weakens the legal basis for their claim. The court needs to know the precise period of the default to calculate the judgment, and missing data can lead to delays or a reduction in the amount awarded. AI-powered form filling tools like Instafill.ai can help prevent these data entry errors by validating information and ensuring date formats are correct. If the form is a non-fillable PDF, Instafill.ai can convert it into an interactive version, reducing manual mistakes.

Frequently Asked Questions About E-C 3502.1

 

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You answer a few questions in plain words, or upload a document you already have. The AI reads what you give it and puts each answer into the right field of E-C 3502.1, on every page, in seconds. It checks the answers against the form's own rules, and you review and change anything before you download, print or sign.
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How complex is E-C 3502.1 to fill out?
E-C 3502.1 has a Form Complexity Index of 44 out of 100, in the basic tier: 44 fillable fields across 2 pages. Instafill.ai's AI fills it in under a minute, with every field there for you to review before you download.
What is the Illinois Eviction Complaint form used for?
This form is used by a landlord or property owner in Illinois to start a legal case in Circuit Court to evict tenants or other occupants from a property. It is the official document that begins the eviction lawsuit.
Who is supposed to fill out this Eviction Complaint form?
The landlord or property owner, who is referred to as the Plaintiff, must fill out this form. It is used to state the reasons why they are seeking to regain legal possession of their property.
Why is it important to check the 'Unknown Occupants' box?
You must check the 'Unknown Occupants' box if you want to evict people living in the property whose names you do not know. If this box is not checked, the sheriff's eviction order may only apply to the named defendants.
What documents do I need to attach to the Eviction Complaint?
You must attach a copy of the eviction Demand or Notice you gave the tenant and the Affidavit of Service proving it was delivered. If the eviction is for a lease violation, you must also attach a copy of the lease agreement.
What if the tenant has not paid rent AND has broken other lease rules?
The form allows you to 'check all that apply' in Section 2. You can check the box for non-payment of rent (2a) and also the box for violating other lease terms (2c), providing an explanation for each.
What is the difference between 'Past due rent' and 'Rent due through the date of judgment'?
'Past due rent' is the specific amount owed at the time of filing. Checking 'Rent due through the date of judgment' allows you to ask the court to also award you rent that accumulates between the filing date and the day the judge makes a final decision.
Where do I get the Case Number for the top of the form?
You will leave the Case Number field blank when you first fill out the form. The Circuit Clerk will assign a Case Number when you file the complaint, which you will then use on all future documents for the case.
After I fill out the form, what is the next step?
After completing and signing the form, you must file it with the Circuit Clerk's office in the county where the property is located. You will also need to pay a filing fee and arrange for the complaint to be officially served to the defendants.
Can I use an AI tool to help me fill out this form?
Yes, services like Instafill.ai use AI to accurately auto-fill form fields, which can save you time and help prevent errors. The AI can use your information to populate details for the plaintiff, defendants, and property address.
How can I fill out this form online using Instafill.ai?
Simply upload the Eviction Complaint PDF to the Instafill.ai platform. The service will make the document interactive, allowing you to easily type your information into the correct fields and save the completed form.
My copy of the form is a PDF that I can't type in. What can I do?
If you have a non-fillable or 'flat' PDF, you can use a service like Instafill.ai. It can convert the document into an interactive, fillable form that you can complete, save, and print from your computer.
How do I sign the form if I am filling it out on a computer?
The form's instructions state that you can sign the document by typing your name in the signature field. This typed signature is legally binding under Illinois Supreme Court Rule 137.
What should I write in Section 2c when explaining a lease violation?
You should be specific and clearly state how the tenant violated the lease. Mention the specific rule that was broken and provide a brief description of the actions, including dates if possible.
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