Confusion over the switchover to new "chip" credit and debit cards and delays in getting those cards into the hands of consumers are creating a golden opportunity for identity thieves, experts say.

When CreditCards.com surveyed the marketplace at the end of September, it found that 60 percent of U.S. credit cardholders still hadn't received a new EMV chip-enabled credit card. Oct. 1 was the "deadline" for merchants to be equipped to accept the new cards - or face liability for fraud committed with an older card - but some card issuers have been lagging in mailing them to customers.