Al eerder aangegeven in dit draadje, maar hier hoor je het ook eens uit een andere bron die het weten kan: Additional Considerations: Electro Static Discharge (statische ontlading van electriciteit) EMV cards make use of a patch of gold contacts that the POS terminal makes electrical contact with. This electrical conductivity makes some chips sensitive to electrostatic discharge (ESD). ESD, commonly known as static electricity, is often created when two materials rub against each other. Common sources are clothing against chairs, shoes against carpet, and tape or plastics rubbing against other plastics. ESD can permanently damage an EMV chip's circuit, or cause errors in the processing of a payment. While modern cards are typically designed to be protected against damage from ESD, certain situations can lead to an increase in chip failures. Dry, cold air, like experienced in the winter, can cause an increase in ESD-related failures, as can some terminals. To avoid such issues, it's advisable to take ...