As the internet has developed over the years, it has become easier and easier for us to sell our goods online. However, there are always dishonest people who want to take advantage of those doing this by means of illegal activities. This booklet has been developed with one goal in mind and that is to make it possible for a common, inexperienced, online seller to identify a con artist and take measures before it is too late. It refers to the techniques they use to fool us with the aid of a step by step guide. It also provides us with the knowledge to use the tools we have at our disposal in order to prevent such unwanted situations.