Instead of presenting two choices: credit or debit, they ask the question "Is this a debit card?" I am using a debit card so the answer is yes, it is a debit card; but you can answer no and they will process as a credit card. It makes me think about it each time. Pretty sneaky -- I am sure it raised their debit card rate
There are two protocols for running a card: "debit" and "credit". "Debit" uses a PIN, and "credit" uses a signature.
There are two types of cards, "debit card" and "credit card". "Debit card" is tied to a bank account, and "credit card" carries a balance paid off at the end of the month.
There isn't a strong connection between the two, at least in America. But when I was working full-time in retail, people would occasionally hand me their cards and say "it's a debit card". The retailer I worked at only supported the "credit" (signature) protocol, so I nodded and ignored the request.
To use credit, you have to press "cancel", which wouldn't be the first thing to come to your mind.
It's insanity.