The Internet is well-known for its fakes and frauds. These exist in the real world too, but the Internet amplifies and changes what is possible, for both better and worse. The many ways in which we use the Internet raises many different issues abut trust. We trust so much of what is on the Internet. ‘Trust on the internet’ discusses three case studies: Wikipedia,, online dating, and customer reviews. When can you trust what is read on Wikipedia or customer reviews on Amazon? How does a company seek to gain, and how much can it lose, from posting false reviews about its goods or services?