I once worked at a computer store as the front end manager (in charge of the cashiers and registers), and customers often made purchases of hundreds of dollars on credit cards. The store policy was to check the signature on the back of every card, for every purchase, and compare the signature to the signature on the receipt. If there was no signature, or if the signature said “Check ID,” the cashier was required to see a picture ID before completing the transaction. While we tended to relax the rule on smaller purchases during busy times, there was a LOT of emphasis on checking the signature on any purchase of more than $100.
During one transaction, a customer made a purchase of several hundred dollars, using a card with no signature on the back. When the cashier checked for the signature (bravo for her!!), she handed the card back and told the customer she couldn’t accept it without a signature. He signed it in front of her, and she actually started to accept it. I had to step in and remind her that an additional ID was required if there was no signature. The purchase was legitimate, but it proved to me the necessity of putting a signature on the back of a card.
Regardless of credit card by-lines, a store holds the final say in whether or not the payment is accepted for a complete transaction, in the long run. If there is a fraudulent check or credit card transaction, the store pays for it, unless they can prove that they attempted to prove the customer’s identity in a credit card transaction.
I do sign the back of my credit card, and I fully expect stores to check the signature on any purchase I make, to the point where I actual show the back of the card to cashiers who don’t ask for it. For large purchases, I have no problems showing an additional ID, if they ask for it. I also only carry two (out of three) cards at maximum with me at any given time, and I do NOT keep my Social Security card in my wallet. This means that if my wallet were stolen or lost, I would have another card I could use until the lost ones are replaced, and the thief/finder would not have enough information to get another card in my name. I also check that I have my wallet every evening when I get home from work, and every morning before I leave for work.
I do wish, though, that my driver’s license didn’t have my home address on it. With computerized databases, and linked police cars, this kind of information could be looked up if necessary, without having it plastered on the ID card I use on a regular basis. (Thank heavens it no longer has the SS number on it, though.)
As for only using a PIN as identification, this worries me tremendously. I am quite sure that both my kids know my PIN, since they have seen me enter it rather frequently when I make purchases using my debit card. Since the debit card has maximum allowable rates for purchases on a daily/weekend basis, and I can (and do!) check for transactions every week day, I am relatively confident that any abuse would be minimal and detected almost immediately. However, I would much prefer to use some kind of thumbprint device as a means of identification, since I can’t forget it and no one can forge it easily.