'In an April 2020 guide ... Signal had been approved ... “official decisions made on this platform must be documented and saved to [the records management system]”.
'... instructed on how to turn on disappearing messages in Signal ... not to enable chat backup.
'A separate policy document ... advised employees to “extract, take a screenshot or take note of any official business conducted on a mobile messaging application” for recording'.
https://www.theguardian.com/australia-news/2025/may/05/home-affairs-let-staff-use-signal-and-disappearing-messages-amid-covid-lockdowns-documents-show