Locking your debit card will prevent transactions with your debit card until you unlock it. Keep in mind that this won’t prevent automatic bill payments or other scheduled transfers from occurring.
To lock your debit card through the website:
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Sign in to capitalone.com
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Click on your checking account with the linked debit card
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Click “account services & settings” (if on a mobile browser, click “more”)
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Click “lock card” from the “manage debit card” section
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Click “Yes, lock my card” to complete the change
To change your debit card PIN through the mobile app:
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Sign in to the Capital One Mobile app (Text “MOBILE” to 80101 for a link to download)
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Tap on your checking account with the linked debit card
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Tap “lock card” on the “I want to…” menu
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Tap “lock card” to complete the change
You can unlock your card by following the same steps to lock your card through the website or mobile app.