Legal tender
The Swiss franc is also the currency used for administrative and accounting purposes by most of the numerous international organisations that are headquartered in Switzerland.
Postage stamps and postal history of Switzerland
Swiss stamps are inscribed with the word "Helvetica", rather than "Schweiz", "Suisse" "Svizzera", or "Svizra". With four official languages-German, French, Italian, and Romansch. The Swiss would have had to put all four languages on each stamp, quite a problem to overcome with such limited space on a stamp.