That phrase doesn't mean what you think it means. Allowed to use it =/= must be accepted. Edit: here are the Feds words. https://www.federalreserve.gov/faqs/c

That phrase doesn't mean what you think it means. Allowed to use it =/= must be accepted. Edit: here are the Feds words. https://www.federalreserve.gov/faqs/currency_12772.htm https://www.federalreserve.gov/faqs/currency_12772.htm