The Information Commissioner's Office (ICO) has issued Her Majesty's Revenue and Customs (HMRC) with an enforcement notice for collecting, retaining and using customers' biometric data in breach of the General Data Protection Regulation (GDPR).

An ICO investigation was launched after it received a complaint about HMRC's use of voice authentication for caller verification on some of their helplines. The characteristics of a voice constitute biometric data which is classed as special category personal data under the GDPR. As such, the individual must be given sufficient information about the processing of their biometric data and the opportunity to give or withhold their consent. 

The enforcement notice requires HMRC to do the following:

  • Delete all biometric data it holds under the Voice ID system for which it does not have explicit consent.
  • Require its suppliers who operate, manage or are involved in the Voice ID system to delete all the biometric data that they process under the Voice ID system for which they do not have explicit consent.

Interestingly, this is the first enforcement action taken in relation to biometric data since the introduction of the GDPR in May 2018, which specifically identifies biometric data as special category data.

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