# Block a specific credit card from being accepted

### You can block a specific card number from transactions directly in your Dashboard or using the Stripe API.
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### **Block a card from the Dashboard**
There are two ways to block a card number in the Dashboard:
1. From the [Payments](https://dashboard.stripe.com/payments) section of your dashboard, click on the charge from the customer whose card you want to block, click **Refund** in the top right corner, and select **Fraudulent** ad the refund reason. This will automatically add the payment’s card and email to your blocklist.
1. If you have [Radar For Fraud Teams](https://stripe.com/us/radar/fraud-teams): navigate to your [Radar blocklist](https://dashboard.stripe.com/radar/lists), where you can view, add, and delete card numbers and email addresses manually.
### **Block a card using the Stripe API**
You can block a card in the API two ways:
1. Create a [refund request](https://stripe.com/docs/api#create_refund) and include `reason='fraudulent'`.
1. Add charges to your [Radar blocklist](https://dashboard.stripe.com/radar/lists) by making a [charge update request](https://stripe.com/docs/api#update_charge) with `fraud_details.user_report='fraudulent'`.