In many countries they are required to do so by law for acquiring any phone number. Including per-paid. It's not uncommon that it's true for _any_ phone number

In many countries they are required to do so by law for acquiring any phone number. Including per-paid. It's not uncommon that it's true for _any_ phone number including VoIP. But a single person as a "company" can get a huge number of VoIP numbers and then "accidentally" get hacked by a illegal phishing call center then using that numbers. Or maybe that persons passport got stolen and used by a similar locking person. Or the passport verifying personal got bribed. Etc.