Special Investigating Unit (SIU)
The Special Investigating Unit (SIU) is South Africa’s independent anti-corruption and civil recovery agency, established on 14 July 1997 by Presidential Proclamation R24 signed by President Nelson Mandela. Its legal basis is the Special Investigating Units and Special Tribunals Act No. 74 of 1996. The SIU investigates serious corruption and maladministration in state institutions and recovers state losses through civil litigation — it cannot arrest or prosecute; criminal referrals go to the National Prosecuting Authority (NPA).
Mandate and powers: Investigate serious malpractices or maladministration in state institutions, state assets and public money; take civil proceedings to recover financial losses; refer evidence of criminal conduct to the NPA. Powers include: subpoena witnesses, bank statements and cellphone records; powers of search and seizure; interrogation under oath.
Special Tribunal (2019): Under Ramaphosa, the Special Tribunal was established in 2019 as a dedicated civil court hearing matters arising from SIU investigations, including asset forfeiture and restitution. This removed the bottleneck of SIU civil recovery cases clogging mainstream High Courts and significantly accelerated recovery timelines.
Key state capture investigations:
- Bosasa/DCS (2006–2009): Investigated Bosasa (African Global Operations) contracts with the Department of Correctional Services (South Africa); found irregularities but took no action at the time. The Zondo Commission later documented this failure of institutional will as allowing corruption to continue for a further decade.
- Transnet locomotives (2021): Declared the 1,064-locomotive contracts (R54 billion) unlawful; co-petitioned the High Court with Transnet to cancel the contracts. The SIU and Transnet brought the application jointly in March 2021.
- Eskom Tegeta coal (2020): Investigated the R3.7 billion Tegeta/Gupta coal contract; found it unlawful; supported the SIU claim that ~R4 billion should be recovered.
- COVID-19 PPE procurement (2020–2022): Ramaphosa issued a proclamation in August 2020 authorising investigation of all COVID-19 procurement fraud. SIU investigated thousands of cases; recovered partial funds; referred hundreds of cases to NPA.
- South African Airways (SAA) (post-2022): Investigated Myeni-era procurement irregularities following Zondo Commission recommendations.
Accountability limitations: The SIU’s fundamental constraint is its civil-only mandate. It can recover stolen funds through court orders but cannot arrest. All criminal referrals depend on NPA capacity and willingness. During the Zuma era this created a veto point — NPA inaction meant SIU findings produced no criminal consequences. The SIU’s Bosasa-DCS investigation (2006–2009) is the clearest example: substantial irregularities documented, no prosecutions for another decade.
Post-Zuma recovery: Under Advocate Andy Mothibi (appointed 2018), the SIU was substantially rebuilt. By 2024 the SIU had restrained or recovered approximately R10.6 billion. Ramaphosa issued multiple proclamations annually expanding SIU mandates across departments and SOEs. The creation of the Investigating Directorate Against Corruption (IDAC) as a permanent NPA unit in August 2024 partially addressed the referral bottleneck.
Connections
- National Prosecuting Authority (NPA) — criminal referral recipient; SIU cannot prosecute; effectiveness depends on NPA follow-through
- Bosasa (African Global Operations) — first major state capture target investigated 2006-2009; inaction enabled decade more corruption
- Transnet — declared locomotive contracts unlawful; co-petitioned High Court to cancel 2021
- Eskom — investigated Tegeta coal contract irregularities
- Department of Correctional Services (South Africa) — Bosasa-DCS investigation
- South African Airways (SAA) — Myeni-era procurement investigation
- Zondo Commission — multiple cross-referrals; SIU findings used by Zondo; Zondo recommended SIU expand investigations