Current 1'000CHF (= 1075USD, 816EUR) banknote is this one :
and it's pretty common around here. I got a waiter friend who's getting paid with one of these at the end of the month. People aren't suspicious about these in switzerland. I never heard of fake ones anyway.
It's funny when you think about it. First time I realized it was that much money was when an american friend of mine visited switzerland. He was really worried about his 5CHF coins, he feared to lose some, saying 5CHF is too much money for a coin. Which makes sense, since it's a coin worth more than 5USD, and swiss' smallest banknote is 10CHF.