infalsificable

English

infalsificable (not comparable)

(archaic) uncounterfeitable (of South American paper money)
- 1920, United States Congressional Serial Set, volume 7665, page 761:
  In the spring of 1916 the infalsificable issue was made ready for flotation. It was prescribed that all notes of the Vera Cruz and provisional government issues should be presented to the treasury for legalization.