What are common mistakes with the Biometric Information Privacy Act (BIPA)?

How BIPA mistakes usually happen in practice

The most common failure is treating biometric collection like ordinary personal-data handling. Biometric identifiers and templates are sensitive because they can be tied to a person’s body and can be difficult to replace if exposed. That means notice, consent, purpose limitation, retention, and destruction are not administrative extras, they are core operating requirements.

Another recurring mistake is assuming one consent workflow covers every use case. If biometrics are collected for timekeeping, identity verification, access control, or vendor onboarding, each use path needs its own legal and operational check so teams do not overcollect, reuse data beyond the stated purpose, or quietly expand the program later.

Teams also miss the practical control layer: where templates are stored, who can access them, how long they remain active, and how deletion is verified. A biometric program fails when policy says one thing and the engineering or HR process does another, especially when retention schedules are vague or destruction is not auditable.

What organisations overlook about notice, retention, and disclosure

BIPA mistakes are often not about a single bad decision, but about weak process design across the data lifecycle. If the privacy notice is generic, if consent is bundled into unrelated terms, or if retention is open-ended, the organisation may technically “have a policy” while still failing the operational obligations that matter.

Disclosure controls are a frequent blind spot. Biometric data should not be shared casually with vendors, affiliates, or internal teams that do not need it, and organisations should be able to explain why any disclosure is permitted. That is why many privacy teams use a broader control baseline, such as the Top 10 Privacy Compliance Mistakes, to check whether retention, consent, and data-sharing rules are actually being enforced.

When biometric handling sits inside a larger privacy programme, BIPA-specific obligations should be mapped alongside other state and sector requirements rather than managed as a one-off exception. For readers comparing obligations across jurisdictions, the US State Privacy Laws Guide is a useful reference point for how sensitive-data rules and opt-in expectations differ across states.

Because biometric data is often used in authentication and verification, the operational design matters as much as the legal wording. NHIMG’s Biometric Authentication and Verification Guide is useful for understanding where template handling, liveness, and biometric privacy choices intersect.

How to reduce BIPA exposure without slowing the business

Start by inventorying every place biometrics enter the business, including onboarding, time clocks, physical access systems, mobile apps, and third-party platforms. The key question is not only whether biometric data is collected, but whether the business can prove why it is collected, how long it is kept, and who can trigger deletion.

Use the shortest defensible retention period and make deletion executable, not aspirational. In practice, that means retention timers, documented destruction steps, and evidence that backups, exports, and downstream systems are covered when the source record is deleted. If deletion cannot be demonstrated, the control is incomplete.

For organisations building a stronger control structure around collection, access, and deletion, the Privacy Programme Guide for Security Teams helps connect privacy obligations to ownership, auditability, and security implementation. When biometric data is part of a broader regulated-data programme, that linkage is what prevents local workarounds from becoming enterprise exposure.

Risk and Threat Considerations

Biometric data creates durable exposure because it is difficult to change once collected. If templates are retained too long, shared too broadly, or stored with weak controls, the organisation can face privacy claims, regulatory scrutiny, and a control failure that cannot be fixed by simply “resetting” the data.

Failure mechanism: Weak notice, overbroad consent, poor retention discipline, or uncontrolled disclosure lets biometric data move beyond the purpose the business can justify.

Impact: The result can be unlawful processing, harder remediation after a breach, and persistent exposure because biometric identifiers are not easily reissued like passwords.

Practitioner Guidance

What to verify: Confirm that every biometric use case has a documented purpose, a specific notice path, a defined retention period, and a deletion method that reaches all systems holding the data, not just the front-end application.

Common mistake: Treating vendor contracts or a privacy policy as proof of compliance when the real risk sits in implementation, especially data sharing, backups, exports, and internal access to templates.

Practitioner takeaway: The safest BIPA posture is not “collect less” in the abstract, but “collect only what you can justify, delete on schedule, and prove the deletion happened.”

Related resources from NHI Mgmt Group

• Biometric Information Privacy Act (BIPA)
• What is the difference between the New Zealand Privacy Act and GDPR for organisations handling personal information?
• What are the common mistakes teams make when operationalising consumer request handling under a new privacy law?
• What are the common privacy notice mistakes organisations make when meeting GDPR transparency duties?