> And all passport holders have a de-facto global UID (but not everyone has a passport and bi-nationals may have several) In India, passport numbers change (fo

> And all passport holders have a de-facto global UID (but not everyone has a passport and bi-nationals may have several) In India, passport numbers change (for the same person) whenever they're reissued (renewal, lost, etc.). That's a good thing, IMO.