Check the front of the ATM/debit card for the long card number printed on it
Look at the back of the card if the number is not on the front
Open your bank’s mobile app and view your card details if the bank provides that feature
Log in to your online banking account and check the card information section
Review your bank statements or card documents if the card number is listed there
Call your bank’s customer service and ask for help verifying the card number
Visit your bank branch with valid ID and request card details
Check any card activation or welcome letter that came with the card
If the card is damaged or unreadable, request a replacement card from your bank