@[email protected] @ElenLeFoll but there have been two different series of Euro notes, and a third will be selected next year, so machines will still need to be reprogrammed to accept the new designs.
https://www.ecb.europa.eu/press/pr/date/2025/html/ecb.pr250131~611055a567.en.html
ECB selects motifs for future euro banknotes

The European Central Bank (ECB) is the central bank of the European Union countries which have adopted the euro. Our main task is to maintain price stability in the euro area and so preserve the purchasing power of the single currency.

European Central Bank