Levels of authentication (Banknote Paper)

The authenticity of banknotes can be ascertained in various ways: Level 1: using human senses such as seeing or feeling (so-called human features). Level 2a: with the assistance of devices such as a magnifying glass, UV light, filters, etc. Level 2b: sensors in processing machines (machine-readable features) and / or forensic devices, e.g. high-tech lab equipment (such as electron microscopes).