well for one thing, hover your mouse over the link that you are supposed to click on, say it is www.fanbox.com.
now look in the lower left corner of your screen and it will show you where the link will direct you to. If they match up you are probably OK. But if the one in the lower left says something else, for instance a site ending in .ru (Russia) you will know it is fake. and look out if it says something that just has the name of the site worked into it someway, like www.fanbox.scamsite.com