an up-close shot of the security thread on a euro banknote, highlighting the tamper-proof technology used to protect

money currency seal tamperproof hologram counterfeits authenticity watermark forgery cash banknote paper finance european europe note euro financial detail guilloche spirograph closeup reflection fluorescence fraud banknotes foil bill union fake fine lines banking pay wealth macro protection exchange microprint futuristic original economic engravings sign mesh fifty savings optical pattern