Sample list - "surface security"

• mikro - writing
• the chip itself (the security inside the chip is another long list...)
• multi layered surface (Kippbild)
• convexo-concave writing
• Kinegramm^® (or just simple hologramm)
• shading colours
• +/- Guillochen structures
• in optical light visible/apparent signs (inside embossment ;-))
• laser engraved photo (B&W)
• laser engraved other data
• laser engraved signature
• laser engraved fingerprint
• surface embossment (rough)
• fluorescent colours
• optical code (2D)
• special material composition
• unpublicated sign(s) till this list gives a "calming" security (ex.: the checking tool is inside the State National Bank)