These can both be used to verify your identity when you're speaking with a customer service representative to cancel a debit card, in addition to your account number, which you can find on a past ...

You must have money deposited into an account to use a debit card. To activate a debit card, call customer support and set up a PIN number. A debit card withdraws money directly from your bank ...

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