A court in São Paulo, Brazil, has ordered Coinbase to refund $100,000 to a user following claims of unauthorized transactions from a self-custody wallet. Despite Coinbase's argument that the user had full control over the wallet's private keys, the court ruled against the exchange. Coinbase was unable to prove that the wallet holder initiated the transaction or that adequate security measures were in place to prevent such incidents. The decision was made under the provisions of the Consumer Protection Law, mandating the refund along with applicable legal interest.