Start with the basics
- Check that the card is active and the details entered at checkout are correct.
- Confirm that enough balance is available to the card for the full merchant amount.
- Check the card’s stated limit and any current account or payment notices.
- Confirm that the merchant accepts the relevant card and payment type.
Other variables can matter
Merchants may run their own fraud checks, use a different processing currency, apply additional verification, or reject certain product categories. Device, region, network, issuer and card-status checks can also affect an attempt.
Use safe next steps
Read the exact merchant error, avoid entering card details on a suspicious page, and review the available information in the official card flow. If the payment is time-sensitive, use the merchant’s official support channel to verify what payment methods it accepts.
Never send a seed phrase, private key or full card details to someone claiming they can manually “fix” a declined payment.