'Voice recordings captured by Amazon's Alexa can be deleted but the automatically produced transcriptions remain in the company's cloud, according to reports.
After Alexa hears its 'wake' word, the smart assistant starts listening and transcribing everything it hears.
All the voice commands said to the virtual assistant can be deleted from the central system, but the company still has the the text logs, according to CNET.
This data is kept on its cloud servers, with no option for users to delete it, but the company claims it is working on ways to make the data inaccessible.
The new finding comes as many reports have shed light over the company's handling of sensitive data, with people scrutinising the tech they use more than ever.
An Amazon spokesperson told MailOnline: 'When a customer deletes a voice recording, we also delete the corresponding text transcript associated with their account from our main Alexa systems and many subsystems, and have work underway to delete it from remaining subsystems.'
The report follows revelations yesterday that more than a dozen consumer advocacy groups plan to file a complaint against the company with the Federal Trade Commission.
They alleged that the tech giant is violating federal laws by failing to obtain parental consent before collecting data on children through Echo devices.
According to the Wall Street Journal the complaint said that Amazon does not disclose how it collects and uses children's data.
The groups argue that the company are violating children's privacy after they discovered youngsters were sharing their names, home addresses, social security numbers and other sensitive information with Alexa, often with little oversight from parents.
Amazon was met with scepticism from some privacy advocates and members of Congress last year when it introduced its first kid-oriented voice assistant.'
Read more: Amazon is keeping your Alexa data in text form even AFTER you delete the audio recordings
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