Illinois Security Deposit Return Demand Letter Template

The Illinois Security Deposit Return Act (765 ILCS 710) gives landlords 30 days to return your deposit after you move out. If they haven't, send a formal demand letter using our free, state-specific builder.

Demand Letter Structure

1. Sender Information
[Your full name or company name]
[Mailing address]
[Email address]
[Phone number]
2. Date
[Date the letter is sent]
3. Recipient Information
[Recipient name or company name]
[Recipient mailing address]
4. Subject Line / Re:
[Re: Security Deposit Return — Demand for Resolution]
5. Statement of Claim
[Brief statement identifying the security deposit return dispute and the parties' relationship]
6. Date(s) of Incident
[Specific date, date range, or description of when the events occurred]
7. Description of Events
[Chronological, factual account of what happened, what was agreed, and how the recipient failed to perform]
8. Contract or Legal Reference
[Citation to the contract, agreement, invoice number, or statute that supports the claim — optional but strengthens the letter]
9. Demand for Relief
[Specific demand — typically return of the security deposit, itemized where possible]
10. Response Deadline
[Number of days the recipient has to respond — typically 7, 15, or 30 days from the date of the letter]
11. Consequences of Non-Response
[Statement that, if the demand is not met by the deadline, the sender will pursue arbitration, mediation, or litigation]
12. Governing State
This dispute is governed by the laws of Illinois.
13. Closing & Signature
[Sincerely / Respectfully,]
[Signature]
[Printed name and title]
14. Enclosures
[Supporting documents — for a security deposit return claim, typically the lease, move-in and move-out photographs, deposit receipt, written communications]
Generate a Demand Letter
Generate a Demand Letter

Template Details

Claim Category
Security Deposit Return
Governing State
Illinois
Typical Use
Pre-litigation notice and settlement demand
Common Evidence
The lease, move-in and move-out photographs, deposit receipt, written communications

This template is provided for informational purposes only and does not constitute legal advice.

About Security Deposit Return Demand Letters

If you're a tenant in Illinois who hasn't received their security deposit back, a formal demand letter is your first step toward recovery. Under the Illinois Security Deposit Return Act (765 ILCS 710), your landlord must return your deposit within 30 days after you vacate—or within 45 days if they plan to deduct for damages. When they miss this deadline, a demand letter puts them on notice, outlines your legal rights, and often prompts a quick return without going to court. Because Illinois small claims courts allow you to sue for up to $10,000 without an attorney, a well-worded demand letter also positions you to win if you later need to file a claim. This template is tailored to Illinois law, so you can confidently request the return of your security deposit along with any required documentation.

An effective Illinois security deposit return demand letter clearly identifies you and your landlord, states the exact address of the rental property, and specifies the amount you're owed. It should cite the 30-day deadline under 765 ILCS 710 and mention the date you moved out. You'll want to include a list of the evidence you have supporting your claim—such as your lease agreement, move-in and move-out photographs, the deposit receipt, and any written communications about the deposit. Demand that the full deposit be returned by a specific date (usually 7 to 14 days) and send the letter via certified mail to create a record of delivery. Our Illinois-specific builder prompts you for all these details and organizes them into a clean, professional document that shows you understand your rights under state law.

Frequently Asked Questions

Under Illinois law (765 ILCS 710/1), a landlord must return your security deposit within 30 days after you vacate the rental unit, unless they plan to make deductions for damages. If deductions are being made, they must provide you with an itemized statement of damages and the remaining deposit within 45 days. The statement must include the estimated or actual cost of repairs. If the landlord fails to meet these deadlines, you are entitled to the full deposit back, regardless of any actual damages. You can then send a demand letter and, if necessary, sue in small claims court.

Illinois small claims courts handle civil disputes involving up to $10,000 (Illinois Supreme Court Rule 282). Since most security deposit amounts fall well within this limit, tenants can file a claim without needing an attorney. Small claims court procedures are simplified, making it easier to present your case. If your deposit exceeds $10,000, you would need to file a regular civil lawsuit, which is more complex. Before suing, a demand letter is recommended to try to resolve the matter out of court.

In Illinois, claims for the return of a security deposit based on a landlord's violation of the Security Deposit Return Act are generally subject to a five-year statute of limitations (735 ILCS 5/13-205). This means you have five years from the date the landlord's violation occurred—typically when they failed to return the deposit or provide an itemized statement within the required 30 or 45 days—to file a lawsuit. It's wise to act sooner rather than later to preserve evidence and witness recollection. If your claim is based purely on a breach of the lease contract, a longer 10-year statute might apply, but most deposit disputes fall under the statutory deadline.

While you don't have to send copies of your evidence with the demand letter itself, you should reference it and keep it ready for court. Key evidence includes your signed lease, move-in and move-out photographs or videos showing the unit's condition, your security deposit receipt, and any written communications with your landlord about the deposit (emails, texts, letters). If you have a move-in checklist or inspection report, include that. Evidence that the landlord received your deposit—like a canceled check or receipt—is particularly important under Illinois law, as the Security Deposit Return Act requires a landlord to provide a receipt indicating the bank where the deposit is held.

Your demand letter should be addressed to the person or entity legally responsible for returning the deposit. Typically, this is the landlord named in your lease. If your landlord is a property management company or an LLC, use their full business name and the address listed in your lease or on the recorded property deed. You can find the owner's mailing address through your county's property tax records. Under Illinois law, a landlord's failure to provide a proper receipt or to hold the deposit in a separate account may affect their right to withhold any portion, so proper identification of the recipient is crucial.

Your demand letter should clearly state the rental property address, the lease dates, the amount of the security deposit you paid, and the date you moved out. Specify that under the Illinois Security Deposit Return Act (765 ILCS 710), the landlord must return the deposit within 30 days (or 45 with an itemized statement). Demand the exact amount you believe you are owed, and give a deadline for payment (often 7 to 14 days). Mention that if they do not comply, you will pursue legal action in small claims court. A specific, detailed letter shows you are serious and informed, which often prompts compliance.

If your landlord ignores your demand letter, you can file a lawsuit in Illinois small claims court. The court filing fee is typically under $300, and you can represent yourself. If you win, the court may order the landlord to pay your security deposit, court costs, and attorney's fees if you had one. Under the Illinois Security Deposit Return Act, if the landlord willfully fails to return the deposit or provide the required statement, you may recover the full deposit, even if some deductions were otherwise valid. Keep copies of your demand letter and any response to present as evidence.

Under Illinois state law (765 ILCS 710), there is no requirement for a landlord to pay interest on a security deposit, unless a local ordinance provides otherwise. For example, the City of Chicago's Residential Landlord and Tenant Ordinance requires interest on deposits held for more than six months. Other municipalities may have similar rules. You should check your local laws. Even if interest is not owed, you are still entitled to a full and timely return of the principal amount. Your demand letter can reference any applicable local interest requirements if they exist.

Yes, the Illinois Security Deposit Return Act (765 ILCS 710/1) allows a tenant who prevails in a lawsuit to recover reasonable attorney's fees and court costs in addition to the deposit amount. This provision is designed to encourage compliance and level the playing field for tenants who might otherwise be reluctant to sue over a relatively small sum. However, attorney's fees are only awarded if you win the case. Because the small claims court limit is $10,000, many tenants choose to represent themselves to save on legal fees, though consulting an attorney can be helpful.

When your landlord is a corporation or LLC, your demand letter should be addressed to the entity as named in the lease, using their registered address. You can find the registered agent for service of process through the Illinois Secretary of State's business search. The demand letter should still outline the same details: property address, deposit amount, move-out date, and violation of 765 ILCS 710. Sending the letter to the correct entity ensures that your notice is legally effective. If you end up in court, proper service on the LLC's registered agent is essential.
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