First of all, examining announcements of vacancy, it is necessary to pay attention to completeness of the published information. As a rule, there are at least 3 sections at serious vacancy: requirements to candidates, duties and operating conditions. The information in these sections should be precise, clear, not washed away. Formulations like "young vigorous men for interesting and perspective work are required" - should guard.Further, communicating with the potential employer by phone, do not hesitate to ask questions concerning forthcoming duties, specify requirements to candidates, and conditions. If on greater part of your questions you receive answers like "come on interview, and here we’ll personally discuss it with you" or "your questions are necessary to discuss personally, it not a subject for telephone conversation" – that is most likely, before you either the swindler, or the representative of a network pyramid. The diligent employer won’t "entice" you on personal meeting. He simply does not have time to invite and spend interviews with all competitors. On the contrary, he will try to estimate (or even "filter") by means of detailed telephone interview your potential suitability under this or that vacancy. The following stage. Having gone to the employer on interview and having received the information about him and your own representation, do not regret time and forces - and look for the information about him in the Internet. There are "black lists" of employers where it is possible to find the interesting facts. But at processing such information - it is necessary to pay attention first of all, on objective factological component of "sins" of the employers who have got in such lists. And not to give in emotional influence of " black PR".