I will try that next time. Never had a problem before though. Cashier rings stuff up. The system waits for a payment. I use my finger print and put the device near the reader, it says processing, and asks me to punch in PIN, and then receipt prints. This is the first time I have ever had it happen at walmart. Do I need to tell them I want it run as a credit transaction instead of debit? It does not give you an option on the little pos display, it just says swipe payment method.