There will be no central register of everybody who lives in HoloWorld. A person is perfectly free to go off and live in a hut in the woods and not be recorded anywhere. There won't either be centralized mandatory registers of different types of people, like people who drive cars, people who go to school, etc. However, any more local organization is free to demand that it knows the people in deals with, and that people provide references to other organizations that know them. In other words, you're welcome to go and hide away and keep all information about yourself private, but you can not demand that specific businesses or communities must admit you into their midst or do business with you, if they don't know you.
Relationships are key.
There is no enforced relationship with a central government that has thick files on you. But if you want something from somebody under conditions that carry any kind of risk to them, you would need to be prepared to establish some kind of relationship of trust with them first. If you're going to rent a car from somebody, or you're going to live in their house, they might feel better about it if you can show them a history of your prior life, and an indication that other people have been happy with you. Registers of other people are fine. However, they are not to be monopolized, and they are primarily reactive rather than proactive.