An overview of the security features
Counterfeiters have been around ever since money was first used. In order to prevent forgery of its banknotes, the Swiss National Bank provides them with special security features.
New security feature for the small denominations
Initially, the perforated number was used on the large banknotes only. Since 2000, this feature has also been incorporated into the 10, 20 and 50 franc notes. Until all the banknotes have been replaced, small denominations with and without the perforated number will be in circulation. Both versions will, however, remain legal tender.