Chip and PIN technology is used with your Citi commercial card as part of a global scheme aimed at preventing fraud. Instead of using your signature to verify your identity, you may now be asked to enter a four-digit Personal Identification Number (PIN) known only to you.
Retailers who have not upgraded to this new technology will continue to request your signature to identify you as the cardholder. Therefore it is important that you sign the back of your card as soon as you receive it.