In brief
Gilmar Mendes proposed taking the mills dispute against the federal government over the defunct IAA, with an impact of R$ 103 billion to R$ 145 billion, to the Supreme Court full bench to standardize the expert proof requirement.
The move follows Vorcaro messages against the justice stance.
What we know
04Verified fact · material
Gilmar Mendes filed on September 22 a motion for the dispute between the federal government and the sugar and ethanol sector over compensation from the defunct Sugar and Alcohol Institute to be taken to the Supreme Court full bench; the Second Panel will examine it in a virtual session from September 25 to October 2.
Changes the venue of a fiscal dispute above R$ 100 billion.
Verified fact · material
The goal is to standardize the understanding on the requirement of individual expert proof of concrete loss, set in a 2020 general repercussion ruling, and Gilmar voted against payments without expert proof in every case he handled.
Signals a restrictive trend for the compensation.
Verified fact
According to Gazeta do Povo, the cases involve appeals by Destilaria Alcídia (ruled in June 2025), Raízen (with Gilmar as rapporteur) and Jalles Machado, and the bill may reach R$ 145 billion; according to Money Times, citing Estadão Conteúdo, the impact recorded in the 2026 Budget Guidelines Law is R$ 103.4 billion.
Sizes the liability under two measures.
Verified fact
According to Gazeta do Povo, Banco MasterBanco MasterOrganizationBrazilian mid-sized bank at the center of regulatory probes into asset valuation and funding, whose stress spread to counterparties such as BRB.Open in the Market Map ↗, owned by Daniel Vorcaro, had bought Alcídia court-ordered payments, Gilmar received Vorcaro on April 11, 2024 to discuss the case, and messages from the banker criticized the justice stance against the payments.
Ties the move to the Master caseBanco MasterOrganizationBrazilian mid-sized bank at the center of regulatory probes into asset valuation and funding, whose stress spread to counterparties such as BRB.Open in the Market Map ↗.
Sources[01]
Transmission to assets
Market read-through
A full bench ruling consolidating the expert proof requirement reduces the largest judicial fiscal risk in the Budget Guidelines Law and is positive for the long end; for Raízen and Jalles Machado, the expected value of compensation falls.
The agricultural court-ordered payment market, where MasterBanco MasterOrganizationBrazilian mid-sized bank at the center of regulatory probes into asset valuation and funding, whose stress spread to counterparties such as BRB.Open in the Market Map ↗ operated, loses liquidity until the issue is ruled.
Portfolio impact
02The expert proof requirement reduces the largest judicial fiscal risk in the Budget Guidelines Law.
Medium term effect on the contingent liability.
What would change the view: Full bench confirming the restrictive thesis.
The expected value of compensation falls with the individual expert proof requirement.
Effect limited to credits already booked.
What would change the view: Full bench ruling following the Gilmar stance.
Direction is an explanatory hypothesis, not a forecast or recommendation.
Next signals
What to watch
- Vote on the motion in the Second Panel by October 2
- Full bench agenda and votes of the other justices
- AGU statement on the fiscal impact
Limits of the reporting
What remains uncertain
- The impact differs by measure: R$ 103.4 billion in the 2026 Budget Guidelines Law and R$ 145 billion in the total estimate.
- Coverage does not say whether the full bench will hold a virtual or in-person trial.