23. The Accounts Payable department notices large out-of-country purchases made using a corporate credit card. After discussing the matter with Juan, the employee whose name is on the credit card, they realize that somebody has illegally obtained the credit card details. You also learn that Juan recently received an e-mail from what appeared to be the credit card company asking him to sign in to their web site to validate his account, which he did. How could this have been avoided?