Redirect mail, then update each sender.
Australia Post offers personal mail redirection from an old address to a new address. Redirection can catch letters while you work through the list, but it does not update the address held by a bank, insurer, government agency or subscription.
Include every relevant name when arranging the service, then keep a note of organisations that still send mail to the old address. Update those accounts directly and check that saved delivery addresses in shopping and payment apps are correct.
