RE:Switzerland Cancels its Paper currencyEvery 10/15 y , for 100 y switzerland change the currency set. While the old notes could be exchanged within 20 y at the BNS before 2020 , now they can be changed at same value for ...U N L I M I T E D time ...at the BNS. So the 8th serie can be exchanged for the new one ...forever.
They do it to make the notes more secure each time.
Exactly the opposite of the article.