When using a credit card IN THE STORE, the checker requires the usual: scan your card, show them the front of the card, show them your ID. But then they also require you to show them the back of the card (I covered up the security code ) AND she asked to see the security code on the back of the card. I refused. The manager erroneously stated that the credit card companies require me to give the checker the security code. I informed the manager this cannot be correct. The transaction would not process without the security code. There was no way to privately enter it. When a consumer is physically present, scanned the card, and is not ordering on line or for any online transaction (my purchases were in my hand) they should not be required to provide the security code to the checker along with the drivers license and letting the clerk re-enter the 16 digit card number somewhere on the computer in the checkout process. Furthermore, the checker was writing information down while processing the transaction. She wrote info from my drivers license as well. I later called the credit card company who stated when I scan in the card the security code is securely and automatically "picked up" and no additional entry of the security code is required. She refuted Best Buys statement that it is required by the credit card company. She said if it were true, it would be required at every store you use the credit card and it is not. The Best Buy manager was incorrect. When I called Best Buy customer service dept to complain, they again stated that the credit card company requires it. This is a lie. Best Buy is requiring customers to take unnecessary risks and invading privacy. It would be different if this were "on line", but when present, it is wrong. Furthermore, they should not allow checkers to write info down while processing orders. If enough people complain, maybe Best Buy will be more customer friendly. As it is, no one will know which checker steals identity and which one does not. The problem exists in the Best Buy system; not with the credit card companies.