Lustration in Central and Eastern Europe is the official public procedure of scrutinizing a public official or a candidate for public office in terms of their history as a witting confidential collaborator (informant) of relevant former communist secret police, an activity widely condemned by the public opinion of those states as morally corrupt due to its essential role in suppressing political opposition and enabling persecution of dissidents. Surfacing of evidence for such a past activity typically inflicts severe reputation damage to the person concerned. It should not be confused with decommunization which is the process of barring former communist regular officials from public offices as well as eliminating communist symbols.

Decommunization in former communist states is the process of purging former communist high officials and eliminating communist symbols.