Coinbase users have been reporting scams and phishing attacks on Twitter, with some scammers using the company's domain name to trick victims. One user, Daniel Mason, received texts and emails from a fraudster using the Coinbase.com domain, who then directed him to a phishing text message and obtained personal information. Other users have reported similar incidents, including one victim who claims a hacker stole their crypto after being authenticated as a Coinbase employee by a support line employee. Coinbase advises users to use strong passwords and two-factor authentication, and warns that its staff will never ask for passwords or verification codes.