In the same way, individuals can prove that, for example, they have paid their taxes, that they live in a certain census district, that they have received a particular vaccination or that they have tested negative for some infection within a certain period, that they hold a valid license in a particular trade or profession, that they have no criminal record and so forth. In no case are any of these credentials linkable to each other or to any other information about the individual. Organizations can store the pseudonymous credentials they receive from individuals so that the individual and the organization can maintain an ongoing relationship if desired.
