Foreign governments are using the push notification data stored by Apple and Google for spying on the users, US Senator Ron Wyden has argued in a letter written to the Justice Department.

New information from an inquiry by the U.S. Congress shows smartphone companies are sharing data from push notifications as part of government surveillance.

Responding to a senator's letter to the Department of Justice, Apple and Google have confirmed governments ask them for push notification data.

A U.S. senator revealed today that government agencies worldwide demand mobile push notification records from Apple and Google users to spy on their customers.

Apple has changed its law enforcement guidelines to require a court order or search warrant in order to obtain push notification records.