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Square CARD_NOT_SUPPORTED error when processing a payment.

The card type is not supported by the payment gateway.

Understanding Square's Payment Gateway

Square is a leading FinTech company that provides a comprehensive payment gateway solution for businesses of all sizes. Its APIs allow developers to integrate payment processing capabilities into their applications, enabling seamless transactions between merchants and customers. Square supports a variety of payment methods, including credit and debit cards, digital wallets, and more.

Identifying the CARD_NOT_SUPPORTED Symptom

When using Square's payment gateway, you might encounter the CARD_NOT_SUPPORTED error. This error typically appears during the transaction process and indicates that the card type being used is not accepted by the gateway. Users may see this error message on their checkout page or receive it as a response from the API.

Explaining the CARD_NOT_SUPPORTED Issue

The CARD_NOT_SUPPORTED error occurs when a customer attempts to use a card that is not supported by Square's payment gateway. This can happen if the card type is not included in the list of accepted payment methods configured in your Square account. For example, certain international cards or less common card networks may not be supported.

Common Causes

  • The card type is not enabled in your Square account settings.
  • The card network is not supported by Square.
  • There might be restrictions on the card for international transactions.

Steps to Resolve the CARD_NOT_SUPPORTED Issue

To resolve the CARD_NOT_SUPPORTED error, follow these steps:

Step 1: Verify Supported Card Types

First, ensure that the card type you are trying to process is supported by Square. You can find a list of supported card types in the Square Payments Documentation. Make sure that your account is configured to accept these card types.

Step 2: Update Account Settings

Log in to your Square Dashboard and navigate to the payment settings. Check if the card type is enabled. If not, update your settings to include the desired card type. For detailed instructions, visit the Square Help Center.

Step 3: Test the Transaction

After updating your settings, attempt the transaction again using the supported card type. Ensure that the card is valid and has sufficient funds. If the issue persists, consider testing with a different card to rule out card-specific problems.

Additional Resources

For further assistance, you can reach out to Square's support team or explore the Square Developer Forums for community-driven solutions. Additionally, reviewing the Square Developer Documentation can provide more insights into handling payment errors.

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Square CARD_NOT_SUPPORTED error when processing a payment.

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