Brazil’s central bank published a rule on August 7 that will require crypto firms to hold certain outbound transfers for up to 24 hours before releasing them, aiming the delay squarely at the two exit points regulators say are hardest to police: self-custody wallets and foreign virtual asset platforms.

Resolution BCB No. 584/2026 amends an existing 2021 fraud-prevention framework for payment providers to explicitly cover crypto and stablecoins. The trigger is a single transaction, or a customer’s combined daily transfers, exceeding $10,000 heading to a self-custody wallet or a platform based outside Brazil. Transfers that stay within a regulated domestic exchange, or move between accounts on the same platform, fall outside the…