### Comment:
What are some common online fraud schemes?

### REPLY:
Some common online fraud schemes include phishing scams, where attackers impersonate legitimate organizations to trick users into revealing personal information such as login credentials and credit card details. Another scheme is identity theft, where criminals steal personal information to carry out fraudulent activities. Pyramid schemes and Ponzi schemes are also prevalent, promising high returns on investment but ultimately relying on recruiting new members to sustain the scheme. Lastly, online auction fraud involves fake listings or non-delivery of goods after payment is made.