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While administrative subpoenas cannot be used to obtain the contents of a person's emails, online searches, or location data, they can demand information specifically about the user, such as what time a user logs in, from where, using which devices, and revealing the email addresses and other identifiable information about who opened an online account. But because administrative subpoenas are not backed by a judge's authority or a court's order, it's largely up to a company whether to give over any data to the requesting government agency.
