a macro image of the special ink on a euro banknote, showcasing the security measures in place to prevent counterfeiting

ink tamperproof microprint fine lines money currency seal hologram counterfeits authenticity watermark forgery cash banknote paper finance european europe note euro financial detail guilloche spirograph closeup reflection fluorescence fraud banknotes bill union fake macro symbol pay economy texture sign print economic pattern engravings original rich protection 10 glowing fifty holographic