The Status of Evidence in Tender Conspiracy from the Perspective of Ibn Qayyim Al-Jauziyah (A Study of KPPU Decision Number 17/KPPU-L/2022 and Supreme Court Decision Number 523 K/Pdt.Sus-KPPU/2024)

Lisa Aula Hasibuan (Universitas Islam Negeri Sumatera Utara)
Mustapa Khamal Rokan (Universitas Islam Negeri Sumatera Utara)

Adagium: Jurnal Ilmiah Hukum
Vol 4 No 2 (2026): Adagium: Jurnal Ilmiah Hukum

Indirect evidence in bid-rigging cases raises the question of when circumstantial indications become legally sufficient proof. This article examines KPPU Decision No. 17/KPPU-L/2022, Supreme Court Decision No. 523 K/Pdt.Sus-KPPU/2024, and Ibn Qayyim Al-Jauziyah's concepts of al-bayyinah and qarinah. The study employs normative legal research using statutory, conceptual, and case approaches and qualitative doctrinal analysis. It finds that indirect evidence is not a separate evidentiary category beyond Article 42 of Law No. 5 of 1999, but an inferential method based on recognized sources. KPPU regarded the initial tender cancellation, changes in the procurement team and documents, and the outcome of the repeated tender as evidence of coordination. The Supreme Court found the evidentiary connection between these events and prohibited cooperation insufficient. Within a comparative qarinah framework, these indications are more appropriately characterized as qarinah zanniyyah than qarinah qatiʿah. The article proposes a reasoned standard requiring established facts, clear inferential links, examination of lawful alternative explanations, and transparent judicial justification.