---
url: >-
  https://acquirer-api-docs-v4-en.pingpongx.com/en/notes/appendix/actionCode/index.md
description: >-
  Issuer response codes list various response codes that may be encountered
  during payment processing, including response codes from Discover, Visa, and
  Mastercard. These codes are used to explain why transactions are accepted,
  rejected, or require further processing, helping merchants and technical
  personnel quickly identify issues and take appropriate actions.
---
## Issuer Response Codes

<v4-ActionCode/>

## Discover Response Codes

<v4-ActionCodeDiscover/> 

## References

<ul>
<li><a href="https://developer.visa.com/request_response_codes#msg_reason_codes">visa developer center</a></li>
<li><a href="https://developer.mastercard.com/mastercard-merchant-presented-qr/documentation/server-apis/response-error-codes/">mastercard developers</a></li>
</ul>