1) Authentication method
Found on
https://www.crosswordclues.com/clue/microprinting
Microprinting is one of many anti-counterfeiting techniques used most often on currency and bank checks, as well as various other items of value. Microprinting involves printing very small text, usually too small to read with the naked eye, onto the note or item. Microprint is frequently hidden in an inconspicuous, unnoticeable area on the note or...
Found on
http://en.wikipedia.org/wiki/Microprinting
Extremely small lettering difficult to discern with the naked eye, used as an anti-counterfeiting device on paper money.
Found on
http://www.encyclo.co.uk/local/10143
No exact match found.
