Before answering this question we need to know the real reason that the victims willingly give their money to the fraudsters?I think there are two main ways that the fraudsters usually use on line.The first way is to pretend to be a single who has much money and focus on the business which caused him not have time to date to attract the singal woman's attention.After the woman falling in love with him then he would make some excuses to let the women to invest in some businesses.Then one transfer money and the other receive the money,finally the man disappears.The second ways is that the fraudsters know that people like to pay less money to get more items.So after paying,you usually receive nothing or false corns.Then you can't find the seller.I have even heard some terrible things that the fraudsters cheated some elders' money which they have used their whole life to save.It caused the old people to suicide.So how to prevent online fraudsters is everyone's essential skill.First buy items via the legal websites and just use the standard payment app,never click the links from screens.Second,if you want to date with someone,just invite him or her to a coffee shop or restaurant and confirm what the person sits against you really is?In short,never believe that any luck will hit your head instead of hard work.