It is in the news that a bank distributed bank notes with dye on them, assumed to be Intelligent banknote neutralisation system (IBNS). It is reported that in one instance this was for mortgage repayments, and the mortgage is now in arrears indicating that the bank did not accept these banknotes for the repayment of debt.
According to google, the definition of legal tender is:
coins or banknotes that must be accepted if offered in payment of a debt.
According to wikipedia, the US is not a country that "allow[s] neutralisation of national banknotes by the National Central Bank" by IBNS.
What is the legal situation here? If one legally comes into possession of bank notes that have apparently been dyed by the IBNS are they legal tender such that if you use them to pay your mortgage they must be accepted?
The jurisdiction here is Atlanta, Georgia, US. The answer for any other jurisdiction that does not explicitly allow neutralisation by the IBNS would be interesting.