Apart from entering a card number and an expiration date, you probably will have to enter a security code — a feature on every credit card meant to help verify the card is in your possession.

A debit card is linked to your checking account and allows you to make purchases or withdraw cash directly from your account.

Security considerations You will need to choose a PIN when setting up your debit card or ATM card. This four-digit number is used to verify every transaction, whether at an ATM or a merchant.