Yeah, as I said if the buyer makes a good faith payment in cash and if the seller didn't inform him beforehand they don't take cash then the onus is presumably

Yeah, as I said if the buyer makes a good faith payment in cash and if the seller didn't inform him beforehand they don't take cash then the onus is presumably on the seller to take it or leave it because the buyer is willing to do his part and make the pie whole. Usually this isn't a problem because "We don't take cash." signs are prominently posted, but we are speaking in the hypothetical after all.