nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpq0v5ltvj87flrs0e659hrpapal7ksupwhfxx5nsr0q86mclczuuzqd2t4tm When I buy some tickets online in Poland I am also asked in some trains to show it. Those tickets are apparently just named. So they are checking only if a passenger with the same name ...