US example. Financial services orgs have your social security number. Perhaps they should be able to forward a message to the US gov to forward it to the citizen stakeholder through a government messaging delivery platform. This ensures continuity of communication but does not allow orgs to lookup emails with loose data governance (and all that leads to).

Login.gov is very good from a federal gov idp perspective, and I’m hoping it slowly develops into supporting a national ID and ubiquitous identity proofing to squash identity fraud but also streamline gov digital service delivery.