Updating a disclosure file when new information is discovered
Guidelines for providing supplemental disclosures if property conditions change or errors are identified after the initial disclosure delivery.
The short answer
If a seller becomes aware of an error or omission in their initial disclosure after it has been delivered, they must provide a written supplemental disclosure before closing. This ensures that the buyer remains informed of the property's true condition, helping to mitigate potential liability for false information or nondisclosure throughout the remaining transaction period.
The Obligation to Supplement Disclosures
The Illinois Residential Real Property Disclosure Act mandates that sellers provide a supplemental disclosure if they discover an inaccuracy after the initial report. Failure to do so can lead to liability for actual damages and court costs. Timely updates protect both parties and maintain the transparency of the transaction.
Decision Worksheet: If you discover a new material defect, list the issue and the date you became aware of it. Question: 'What is the most secure method to ensure the buyer receives this update before we reach closing?'
Determining Materiality in New Discoveries
Not every minor change requires a supplemental report. Focus on conditions that significantly impair health or safety or substantially affect property value. If you are uncertain whether a new discovery meets this threshold, consult with your legal counsel or professional advisor to determine the necessity of an update.
Hypothetical Planning Example: A seller learns of a leak in the basement after the contract is signed. They conclude this affects property value and safety, so they draft a supplemental disclosure clearly stating the date and nature of the leak.
Managing Buyer Termination Rights
When a material defect is disclosed after a contract is signed, the buyer may have a right to terminate the contract within five business days. However, these rights are generally restricted unless the defect was known at the time of the original disclosure or is not repairable. Termination rights cease upon property conveyance.
Decision Worksheet: Review your original disclosure. Identify any items you previously marked as unknown that have now been clarified. Ask a professional: 'Does this specific disclosure trigger a right of rescission for the buyer?'
Record Keeping for Updates
Always keep copies of the initial disclosure and every supplemental report provided. Documentation of when the supplement was delivered is essential for avoiding potential claims of misrepresentation. Ensure these records are stored safely for at least one year following possession or occupancy.
Decision Worksheet: Create a dedicated 'Disclosure Update' folder. Ensure every supplemental document is signed and dated by both parties to prove delivery and acknowledgment.
Checklist
- Document the exact date you discovered the new information
- Consult with a professional to confirm the item is a material defect
- Prepare a written supplemental disclosure document
- Deliver the supplement to the buyer promptly
- Obtain a signed receipt for the supplemental document
Common questions
Am I required to provide a supplemental disclosure for a repair that was already completed?
Sellers are generally not liable if an omission is based on a reasonable belief that a defect was corrected. However, you should consult your professional to decide if mentioning the repair adds necessary clarity.
Can the buyer cancel the contract if I provide a supplemental disclosure?
The buyer may have a five-day termination window for certain material defects disclosed after signing. Rights are limited if the defect was not known originally or is fully repairable.
Sources
- Illinois Residential Real Property Disclosure ActChecked October 12, 2026
- Illinois Condominium Property Act — 2025 editionChecked October 12, 2026
- IEMA-OHS — Real estate radon guidanceChecked October 12, 2026
- EPA — Real estate lead-hazard disclosuresChecked October 12, 2026
This guide is general educational content from SQFT IO, prepared with AI assistance. It is not legal, tax or loan advice. Talk with a licensed attorney, tax professional or lender about your situation. SQFT IO Illinois license 478.027617.