This might sign that a skimmer or shimmer continues to be put in. Also, you need to pull on the cardboard reader to see no matter whether It is really loose, which might reveal the pump has long been tampered with. There are 2 key techniques in credit card cloning: https://c-est-quoi-une-carte-clon68912.azzablog.com/33953069/an-unbiased-view-of-clone-carte-bancaire