Disinformation is false information which is intended to mislead. Intentionally misleading information or Disinformation is ubiquitous and can be extremely dangerous. If people are misled by deceptive advertising, government propaganda, doctored photographs, forged documents, fake maps, internet frauds, fake websites, they can be harmed in several levels (emotional, physical etc.). In order to deal with this serious threat to information quality, people need to improve understanding of the nature and scope of disinformation. One way to understand disinformation is by identifying and classifying the various types of disinformation, such as lies, spin, and rumours. If we are aware of the definition and the various ways that people might try to mislead, we will be in a better position to avoid being duped by intentionally misleading information.