Brazil's central bank barred regulated eFX providers from using stablecoins, Bitcoin, or other cryptocurrencies to settle cross-border payments. Resolution No. 561 was published April 30, takes effect October 1, and gives some firms until 2027 to adapt or seek authorization. The rule requires settlement to move through a foreign exchange transaction or a non-resident real-denominated account in Brazil. The change does not ban crypto trading, but it closes a payment rail used by firms such as Wise, Nomad, and Braza Bank.