This chapter examines the conditions under which lustration and truth commissions affected trust in targeted public institutions, such as the judiciary, the parliament, the police, and political parties, or composites of institutions, such as oversight institutions or elected institutions. I find strong and consistent relationships between lustration and political trust, except for the most highly politicized public institutions. More extensive and compulsory programs were associated with the largest trust-building effects. Truth commissions were not associated with political trust-building. This chapter also demonstrates that delayed reforms were more effective than reforms initiated right after the transition for most of the institutions, except for highly politicized institutions. This runs contrary to assumptions about the necessity of starting reforms immediately after the transition or not at all. The chapter presents the paired cases of Bulgaria and Romania and illustrates the possibilities for public disclosure programs to effect lustration-like reforms.