More realistically than administering some kind of test would be to force people to opt out of basic necessities care. So a person's UBI would be portioned off

More realistically than administering some kind of test would be to force people to opt out of basic necessities care. So a person's UBI would be portioned off for food, health, state living facilities etc. so they would always have the bare minimum to survive. If I happened upon a person in need I would merely need to simply bring them to the nearest grocery store and their food needs would be taken care of. Since its opt out, they likely won't have the facilities to opt out. My biggest concern is how you logistically provide money to people. What do you use to distribute it? Some sort of state owned bank? What about identification?