check the new banknotes with this simple procedure:
Touch - The elements in relief in the character’s
face and in the caption of the denomination.
See - Against the light the character’s face and
the see-through register.
Turn around - The banknote
and see how the map of Costa Rica changes from purple to green, and the figures in the
security thread are floating (10,000, 20,000 and 50,000 denominations),or
that the tread color changes (2,000 and 5,000 denominations.)
video of the new series of banknotes may help you better understand this
system and distinguish its security features.