Brazil's central bank is adding a waiting period to some crypto transfers, tightening the rules around how domestic exchanges send customer assets abroad or into self-custody.

Under Resolution BCB No. 584/2026, reported by CoinDesk and published by the Banco Central do Brasil, exchanges will need to hold certain transfers for up to 24 hours starting Jan. 1, 2027. The rule applies when a customer deposits reais or crypto with an exchange and then tries to move the funds to a foreign platform or a wallet they control.

The clearest trigger is size: transfers above the equivalent of $10,000, including several transactions on the same day, fall under the mandatory review. Smaller transfers can also be delayed if the exchange flags risk based on the customer, transaction pattern, counterparty or destination jurisdiction.

The measure is framed as an anti-fraud rule, not a permanent block. Exchanges may release a transfer before the full 24 hours if their review finds no sign of wrongdoing, but they must document the decision and notify the customer when a hold is applied.

For crypto users in Brazil, the practical change is that self-custody and offshore exchange transfers may become less instant once funds pass through a regulated local provider. For exchanges, it shifts more fraud-screening responsibility onto their own risk systems.