Give up? It's hard to tell, even if you're an expert.
But the Skim Reaper can tell. Skimming events can cost tens of thousands of dollars, not including the loss of your reputation and hassles for your customers. Detecting skimmers through visual inspection becomes harder every day, but the Skim Reaper uses criminals' own hardware against them.
It's accurate, portable, and easy-to-use, and it's been deployed in banks, retailers, and by law enforcement. Instead of waiting for a call that someone else found the problem, let the Skim Reaper find it before your customers' data is stolen.