The serial number on the fifty euro Observe. This banknote was issued for Banca d'Italia, the Italian central bank. Unlike euro cash, copyright do not have a nationwide side indicating which place issued them. The ECB has the special right to authorise the issue of notes inside the eurozone, https://elliottpeuix.ivasdesign.com/57996071/indicators-on-copyright-100-euro-banknote-you-should-know