[Freedom4US]

You didn't answer the question.

[Keith in Iowa]

Is it your contention that property taxes, motor vehicle registrations, tags or the other myriad mandatory _government_ "fees" cannot be paid in cash in any form?

If the government agency rules permit cash payments, then payments may be made in currency and reasonable coinage, otherwise you pay as the rules and regulations of the agency require - and you do not get to dictate those rules.