The Supreme Court of California recently ruled that retailers do not have the right to ask for a customer’s ZIP code  because a 1971 state law prohibits a business from asking credit cardholders for personal identifying information.
I’ve personally never minded when the cashier asks me for a ZIP code but I know a few people who don’t like it. They are concerned that it invades their privacy and they don’t see the purpose of providing it, I agree with them on both counts. That said, if push ever came to shove and I didn’t want to give my real ZIP code, I’d just make one up. I doubt my credit card would be declined though I’ve never put it to the test.
Is this something that concerns you or do you think the privacy issues are overblown?