Detailed text transcripts for TV channel - FOXNEWS - 20180408:09:55:00
A signature. we think there's some sort of legitimacy to signing a receipt. in reality, it's not a good form of security. >> reporter: signature authentication has been replaced by technology. unusual spending patterns and transaction locations are red flags. some retailers say more needs to be done to he prevent fraud and want u.s. credit cards, much like those in europe, to require the use of a p.i.n. >> the reason it's effective is it in theory only you know your p.i.n. even if a credit card is stolen, there's nothing on that card that indicates what the p.i.n. is. >> reporter: the credit c...