17.
a. Only give your number if you have made the call, and you trust the person you are talking to.
b. Do shred credit card bills. If you don’t, a thief may find your credit card number in the trash.
c. It’s important to keep your credit card number safe.
d. Thieves may use it to buy goods without your knowledge.
e. You might then find you can’t use the card when you really need it.
f. Don’t give your credit card number to someone who calls you.