Fact 1: the more valuable the note, the longer its lifespan.
How long do our notes actually last? A 10 franc note lasts just about four years, a 100 franc note lasts slightly more than five years and a 1,000 franc note lasts as many as 20 years. In summary, how long banknotes last depends on how much they are worth, so large denominations tend to have a greater lifespan than smaller ones.