The SISMI Payment Scandal refers to investigations into unauthorized financial payments made by Italy's military intelligence service, the Servizio per le Informazioni e la Sicurezza Militare (SISMI), during the 1980s. SISMI, established in 1978 as Italy's external intelligence agency, was responsible for gathering military and security intelligence abroad. The scandal involved allegations of illicit payments to foreign consultants and operatives, often routed through offshore banking channels to fund covert operations without official government oversight. These activities were part of broader Cold War-era intelligence efforts, including counter-terrorism and anti-communist initiatives, but raised concerns about accountability, misuse of public funds, and potential links to organized crime or political manipulation.

The investigations gained prominence in the 1990s following the collapse of the Soviet Union and increased scrutiny of Italian intelligence services amid domestic scandals like the Mani Pulite (Clean Hands) corruption probes. Key figures, including SISMI directors such as Admiral Fulvio Martini (1984-1991), faced probes for authorizing 'black funds' used in these payments. Documents revealed transactions involving Swiss and other offshore accounts, with payments estimated in the millions of lire to consultants for services like disinformation campaigns or liaison with foreign entities. The scandal highlighted systemic issues within SISMI, including lack of parliamentary oversight and entanglement with Masonic lodge P2, which had infiltrated Italian institutions.

Outcomes included parliamentary inquiries, resignations, and reforms leading to SISMI's restructuring and eventual dissolution in 2007, replaced by AISE (Agenzia Informazioni e Sicurezza Esterna). No major criminal convictions directly stemmed from the payment allegations, but they contributed to a climate of distrust in Italy's intelligence apparatus. The scandal underscored the opaque nature of intelligence financing during the Cold War, with ongoing debates about the extent of unauthorized operations and their geopolitical implications.