An Ostrakon
It turns out that cancelling people out isn’t relatively a 21st century concept. An ostracon is a piece of pottery, often broken off from a vase and has writing scratched into them, but that’s not all. These inscriptions were either short or long. But in the case of Ostracism, Greeks would vote whether to exile a member of their society by writing the name of the individual on an ostracon. If the person received enough votes against them, they would be exiled from the city for up to ten years.