Just been to Liverpool airport short stay car park.On third floor there was no option to pay by cash only by card.I put in my card and then noticed there wasn't a keypad to in put my pin.
The machine took payment without the pin how can this be possible?
No! A lot of transactions ask for your address, as security, and/or a verification code (depending on your bank), but debit card security, and protection are pretty thin. I think VISA is the only card that offers any real protection, like a credit card. I tend to use a pre-paid credit card online, unless I know (and trust) the site I'm dealing with, for small transactions. It's about the safest way (worth the 3% handling charge).
The payment machines in Shudehill bus station car park in Manchester are the same - I use the car park a lot and have never had a problem, although the payments seem to take a couple of extra days before they show on my account.