Banks are always on their toes to improve security standards to avoid the falsification of bills. Some models automatically update their software when there are new changes in the currency or the security standards. On the flip side, other models update their software using a computer.  Counterfeit money detectors usually come with USB ports that can connect these machines to the computer, thereby making their updates easy. Some devices also come with MicroSD slots. Additionally, it's advisable to keep an eye out for the updates provided by the Central Bank.