If you notice an unauthorized or incorrect transaction on your Coinbase account 1-(866)-719-5714, you can dispute it through the platform. Start by logging into your account and visiting the "Help" 1-(866)-719-5714 section. Select the transaction in question and submit a support request 1-(866)-719-5714 with relevant details. Be sure to include any evidence you have. Coinbase’s support team will review the case and follow up 1-(866)-719-5714 via email. Always enable two-factor authentication to 1-(866)-719-5714 to enhance your account security.