The Federal Reserve link says specifically “There is no federal statute mandating that a private business, a person, or an organization must accept currency or coins as payment for goods or services.” They can refuse cash in favor of other forms of payment (e.g. credit card, personal check, or any of the digital payment services). The statute says that currency is legal to use for commerce, not that it must be.
For goods and services. That’s prior to the existence of a transaction.
The literal second they can’t walk away without paying you, you unambiguously must accept the actual paper. You unconditionally can not mandate any other form of payment after the fact.
The Federal Reserve link says specifically “There is no federal statute mandating that a private business, a person, or an organization must accept currency or coins as payment for goods or services.” They can refuse cash in favor of other forms of payment (e.g. credit card, personal check, or any of the digital payment services). The statute says that currency is legal to use for commerce, not that it must be.
For goods and services. That’s prior to the existence of a transaction.
The literal second they can’t walk away without paying you, you unambiguously must accept the actual paper. You unconditionally can not mandate any other form of payment after the fact.