Brazilian prosecutors have closed a 15-year investigation into financial dealings linked to the Swiss bank Monte Branco. The case, which initially exposed hidden financial circuits in Switzerland, also spawned investigations like Operation Marquês. The decision to archive the case hinged on tax amnesties and voluntary regularization agreements offered to individuals involved. Prosecutors cited a lack of sufficient evidence to pursue further legal action. These agreements allowed individuals to settle outstanding tax liabilities, effectively resolving the financial irregularities at the heart of the investigation. The closure marks the end of a long-running inquiry into offshore financial activity and its connections to Brazil.