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When a payment fails, the processor returns a decline code that indicates why. Use this page to find where each processor documents its codes and to understand common categories.

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Understanding Decline Codes

  • Decline codes help identify the reason for failed transactions.
  • Each payment processor has its own list of decline codes.
  • Understanding decline codes helps merchants troubleshoot and improve transaction approval rates.

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Processor-Specific Decline Codes

Below are links to official processor documentation for detailed decline code lists:

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Worldpay

Worldpay Decline Codes

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Nuvei

Nuvei Decline Codes

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EPX

EPX Decline Codes

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Adyen

Adyen Decline Codes For additional assistance, refer to each processor’s documentation or contact support. For additional assistance, refer to each processor’s documentation or contact support via the portal (log in and use the help icon).

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Common Decline Code Categories