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Are PINs always needed for paying with card?
There generally isn't much in the way of real identity verification, at least in the US and online.  The protection you get is that with most credit cards you can report your card stolen (within some amount of time) and the fraudulent charges dropped. The merchant is the one that usually ends up paying for it if it gets charged back so it's usually in the merchant's best interest to do verification.  However the cost of doing so (inconvenience to the customer, or if it's an impulse buy, giving them more time to change their mind, etc) is often greater than the occasional fraudulent charge so they usually don't do too much about it unless they're in a business where it's a frequent problem.