I got a new debit card in the mail yesterday. It had a sticker on it with a phone number to call to activate it. So I had to enter the card number, expiration date, last 4 of my SSN, zip code, the code on the back of the card, and my desired PIN and then the computer was happy. I looked at that crazy long number I had entered and I guess with a long number string, I am unique in the world!