What is the process for excommunication in Judaism? I'm familiar with excommunication in the Catholic Church and was told that the process is different in Judaism.
Bava Metzia 59b says that at the end of the episode of the Oven of Akhnai, Rabbi Eliezer ben Hyrcanus was excommunicated. (Apparently there's a makhloket about whether this was nidui or cherem.) The ...
Let's suppose that someone in a community has been put in cheirem, for whatever reason. This would generally ban him from the community shul. Should this person show up in the community shul, however, ...