There is something like this being used in jails and prisons now. The purpose is to limit the ability of people to sneak in paper bathed in fentanyl or other potent enough substances.

Inmates do not receive originals - incoming mail is scanned at some service provider’s office that a PO Box forwards to, and things are reprinted at the detention center and walked to the inmate. Or people sign up for a faster service where photos / letters are uploaded through an app to skip the snail mail + scanning step.

One of these is called pigeon.ly

At most participating facilities the only exception to get an inmate physical paper from the outside world is legal mail.