Client Alert
Billee Elliott McAuliffe, Christine G. Hall-Schweiss
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Litigation under the Illinois Biometric Information Privacy Act (“BIPA”) is increasingly and very recently focused on one category of biometric data that many organizations may overlook: voiceprints. Recent lawsuits have focused on AI-powered transcription, speaker recognition, and voice analytics tools as an unlawful use of participants’ voiceprints without proper consent.
BIPA defines “biometric identifiers” to include voiceprints. Unlike general audio recordings, a voiceprint involves the analysis of unique vocal characteristics to identify or distinguish a speaker. Plaintiffs are alleging that software creates biometric identifiers subject to the statute when it attributes speech to specific individuals using speaker recognition technology.
To comply with BIPA, a company collecting voiceprints must:
The collecting company must also publish a publicly available written retention and destruction policy. As discussed in our recent client alert, statutory damages are significant: $1,000 per negligent violation and $5,000 per reckless or intentional violation with potential accrual on a per-scan basis under Cothron v. White Castle System, Inc.
Ambient Listening a part of the allegations in recent lawsuits.
In Cruz v. Fireflies.AI Corp., filed on December 18, 2025 in Illinois District Court, the plaintiff alleges that an AI meeting assistant violated BIPA by recording virtual meetings and using speaker recognition technology to distinguish between participants. According to the complaint, the software automatically joins meetings when enabled by a host, records and transcribes conversations, identifies and labels individual speakers, and stores the resulting data.
The plaintiff alleges that these functions necessarily involve creating voice-derived identifiers and that meeting participants, who never created accounts and never signed any written release, were not provided BIPA-compliant notice or consent.
The case, which has just began litigation, reflects a growing theory of liability: even where a company does not market its product as “biometric,” functionality that distinguishes speakers based on vocal characteristics may qualify as voiceprint collection under Illinois law.
Voiceprint-related risk is not limited just to AI transcription vendors. Employers and organizations may face exposure where they deploy tools such as voice authentication systems, call center voice analytics tools, meeting transcription software, productivity monitoring software, or security systems using vocal identification.
Out-of-state technology providers may also face jurisdictional exposure if their tools are used by Illinois entities or affect Illinois residents. Similar to the allegations in Fireflis.AI Corp, in Basich et al. v. Microsoft Corp., plaintiffs allege that consent from one user (such as a meeting host) is insufficient for other participants whose voiceprints are captured during an AI live transcription feature in Microsoft’s Teams product while the participants are physically located in Illinois. The complaint focuses on a specific background process known as “diarization” which creates real-time meeting transcripts by distinguishing who is speaking using unique vocal characteristics, which plaintiffs contend is a collection of a “voiceprint”.
Recent filings confirm that voice-enabled AI tools are a developing frontier of BIPA litigation. Organizations operating in Illinois, or interacting with Illinois residents, should carefully evaluate whether any technology they deploy analyzes or distinguishes speakers based on vocal characteristics (i.e., create “voiceprints”).
If voiceprints are implicated, strict compliance with BIPA’s notice, written release, and retention policy requirements is essential to avoid potentially significant statutory exposure.
For questions regarding voiceprint-related compliance, AI deployment, or BIPA risk assessment, please contact one of our Data Privacy & Cybersecurity attorneys.