We'd think that the polymer banknotes could put up with real laundering rather than the usual criminal money laundering. Hot water and the detergents we use can do a number on the polymer notes. The old Cotton/linen paper does stand up well in detergent laundering, they just fade. Today, there are more odd chemicals in our detergents, if they can break down polymer as well as !PIZZA stains, I will not recommend putting your banknote in the laundry machine. Just hand wash in mild soapy water.