payment terminal scams and card skimming are different cases of scams - this forum is dealing with online scams only.
There are a lot of sites active online posting about how you can avoid it. Here is one example: http://www.creditcards.com/credit-card- ... m-1282.php
Hope that helps.
Help yourself by helping others - report your scammer here.Google can be your best friend
;use it if you have doubts about someone met online. If someone met online only asks for money, no matter what reason, it´s 100% scam.