Not all the photographs that spread around the Internet and social media are reliable. But how can you know if you are being conned? What should you focus on to tell if an image has been tampered with? How can you identify if a photograph corresponds to a specific circumstance or predates the event? We offer you the keys, tools and resources to check a photograph. You will also find additional material such as evidence from specialists, games to try out your skills, examples of fakes and other content.