“Putting ‘See ID’ on the signature line on the back of your cards will stop a credit card thief cold and absolve you of any liability if a thief uses it.”
Unfortunately, this is not true. An unsigned credit card is invalid, technically, according to the agreements that card issuers have with retailers. Moreover, many store clerks don’t even check for signatures at all, meaning that they are unlikely to see “See ID” on the back of your card, even if it is there. No matter what’s on the back, you are only liable for up to $50 charged when a card is stolen, and some companies waive that for their cardholders.