Have you heard of the 'Freemen Living on the Land' movement? It's a libertarian movement where they believe your birth certificate is essentially you becoming a belonging of the corporate state of which ever country you live in and your social insurance number is essentially your bar-code.
They believe that many countries are now operating in bankruptcy and are therefore under admiralty law and that since the abolition of the gold standard, countries currency is backed not by gold but by the people tracked by their Social insurance numbers and treated as the counties property or essentially their slaves. They describe persons as creditors of the country's corporation. They may believe that the government controls secret bank accounts in their name as part of this theory, which may be accessed to pay off the countries debts.
None of the beliefs held by freemen have ever been supported by any court judgments or verdicts in anywhere though unfortunately. It would certainly erode our legal system if any judge were to rule in their favor.