If, subsequent to compliance with any request or order for discovery, including partial compliance subject to an objection or made notwithstanding an objection, and prior to or during trial, a party discovers additional or new material or information previously requested and ordered subject to discovery or inspection or discovers that the prior compliance was totally or partially incorrect or, though correct when made, is no longer true and the circumstances are such that a failure to amend the compliance is in substance a knowing concealment, that party shall promptly notify the other party, or the other party’s attorney, and file and serve in accordance with Sections 10-12 through 10-17 a supplemental or corrected compliance.
Section 13-15.Continuing Duty To Disclose
Current through August 12, 2025 (2026 Practice Book edition) · Last verified July 9, 2026
In one sentenceRequires a party who learns that its earlier discovery compliance was wrong or is now outdated to promptly notify the other side and file a supplemental or corrected response, when staying silent would amount to knowing concealment.
Full Text of Section 13-15
Amendment History
(P.B. 1978-1997, Sec. 232.) (Amended June 23, 2017, to take effect Jan. 1, 2018.)
Plain-English Summary
Section 13-15 creates a continuing duty to disclose. Once a party has complied with a discovery request or order — even partial compliance made subject to, or despite, an objection — that party is not done if circumstances change. If, before or during trial, the party discovers additional or new material that was previously requested, or learns that its earlier compliance was wrong when made or has since become untrue, and staying silent would amount to knowing concealment, the party must act. It must promptly notify the other party or that party’s attorney and file and serve a supplemental or corrected compliance.
Frequently Asked Questions
When must a party update a discovery response in Connecticut?
Under Section 13-15, a party must supplement or correct its compliance when it later discovers additional requested material, or learns its earlier response was wrong or is no longer true, and silence would amount to knowing concealment.
Does the duty to supplement discovery apply only before trial?
No. Section 13-15 applies both before and during trial — the duty to correct or supplement compliance continues as long as the case is ongoing.
What happens if a party ignores this continuing duty to disclose?
Failing to comply with Section 13-15 is one of the grounds listed in Section 13-14 for a motion asking the court to order compliance or impose other sanctions.
Source & verification. The section text is reproduced verbatim from the
official Connecticut Practice Book (Conn. Practice Book § 13-15). Prescribed by the Judges of the Superior Court of Connecticut (Conn. Gen. Stat. Section 51-14). The plain-English summary is original and written by us. Last verified July 9, 2026. ·
Official source
Also known as: continuing duty to disclose Connecticutduty to supplement discovery response CTcorrecting discovery answersupdating interrogatory answersknowing concealment discovery