First, look up someone in the phone book, and obtain as much 
information as possible about them.  Then, during business hours, 
call in a very convincing voice - "Hello, this is John Doe from 
the Visa Credit Card Fraud Investigations Department.  We have 
been informed that your credit card may have been used for 
fraudulent purposes, so will you please read off the numbers 
appearing on your Visa card for verification."  Of course, use 
your imagination!  Believe it or not, many people will fall for 
this ploy and give out their credit information.

Now, assuming that you have your victim's credit card number, you 
should be able to decipher the information given.

Step Two:  Recognizing information from carbon copies