Locking your debit card will prevent transactions until you unlock it. Keep in mind that this won’t prevent automatic bill payments or other scheduled transfers from occurring.

  1. Sign in to your account—online or on the Capital One Mobile app. (Text “MOBILE” to 80101 for a link to download).
  2. Select the account linked to your debit card

On the web: Choose “Account Services and Settings.” step 2a
• Under “Account Management,” choose “Lock Your Card” and follow the steps.

On the app: Scroll down to “Debit Card Help” and select “Lock Card.” step 2c
Lock or unlock your card now. Sign in to your account.