When holding the 100-, 200-, 500- and 1000-peso banknotes (F-type) against the light, you can see a thread of approximately one millimeter (width) that crosses the note vertically. This thread is known as security thread and is manufactured directly onto the cotton-paper substrate.
100 pesos | 200 pesos | Security thread in 200-peso banknote |
500 pesos | 1000 pesos |
Examination against the light
This feature is detected when holding the banknote against the light.