[Tomte]

It's also why Donald Knuth doesn't hand out real cheques anymore… too many people (me included, but I later blackened those parts) posted pictures of their cheques online: https://www-cs-faculty.stanford.edu/~knuth/news08.html

I don't know if something really happened or if he was just being cautious, but so the Bank of San Seriffe was born: https://www-cs-faculty.stanford.edu/~knuth/boss.html