What are some possible authentication questions I may be asked?

As the cardholder, you may be asked for the last transaction made with the card they are trying to set up, along with the purchase amount and either the date or merchant name. Additionally, you may be asked for the last four (4) digits of your social security number, date of birth, mother’s maiden name, home telephone number, expiration date of your card and/or zipcode. You are able to call back and verify your information at a later date if you are unsure of information for an answer.