If you notice a fraudulent or unauthorized transaction on your Robinhood account, report it to Robinhood Support immediately. Open the Robinhood app, locate the transaction in your history, and select Report an issue to begin the dispute process. Provide accurate details and supporting documents, such as screenshots, receipts, or relevant confirmations. If your account may be compromised, freeze it and remove unfamiliar devices before changing your password. Contact Robinhood only through the official app or website, as scammers may advertise fake support numbers online. Never share your password, two-factor authentication code, or secret recovery phrase with anyone claiming to be Robinhood Support.