Biometric Time-Tracking System Deployed Without Mandatory DPIA
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A Spanish employer deployed a biometric fingerprint-based time-recording system without conducting a Data Protection Impact Assessment (DPIA) as required by GDPR Article 35, which is mandatory when processing special-category data like biometrics. The employer also failed to demonstrate that the system was necessary, proportionate, or that less privacy-invasive alternatives had been considered. This case underscores that deploying high-risk data processing systems without prior risk assessment exposes organisations to regulatory sanctions even if the system is later removed. It also highlights that privacy compliance must be built into system design decisions from the outset, not addressed retroactively.
Tactical Insight
Before deployment
- Conduct a formal DPIA before implementing any system that processes biometric or other special-category personal data.
- Evaluate and document less privacy-invasive alternatives (e.g., card-based, PIN-based systems) and justify why biometric processing is strictly necessary.
Governance and oversight
- Establish a mandatory privacy review gate in the IT and HR procurement process so no high-risk system goes live without DPO sign-off.
- Maintain a record of processing activities (RoPA) that flags any processing of Article 9 special-category data for automatic DPIA triggers.
Long-term improvements
- Train HR, facilities, and procurement staff on GDPR requirements for biometric data so they recognise when a DPIA is legally required.
- Implement a periodic review cycle to reassess the necessity and proportionality of all existing special-category data processing systems.