Under a law adopted on July 4 by the Hungarian parliament, banks have to compensate customers for FX loan contracts. The law says  one-sided contract modifications are void unless the banks can prove in court that the modifications were legal. The Curia, the Hungarian Supreme Court, also said unilateral changes made by a bank to a contract could be considered legal if some principles were respected.

The banks have submitted tens of thousands of pages of documents. The Court will put the cases on its agenda in 8 days. Once a date has been determined, judges must reach a verdict within 30 days, the court’s press statement said.