How To Fix HRPAYCH_ELM40012 - The response message was signed with an unknown certificate

SAP Error Message - Details

• Message type: E = Error

• Message class: HRPAYCH_ELM40 - Messages for Withholding Tax

• Message number: 012

• Message text: The response message was signed with an unknown certificate

Self-Explanatory Message

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To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message HRPAYCH_ELM40012 - The response message was signed with an unknown certificate ?

  The SAP error message HRPAYCH_ELM40012 indicates that the response message was signed with an unknown certificate. This typically occurs in the context of electronic payroll processing or communication with external systems, such as banks or government agencies, where secure communication is required.
  Cause:
  
  
  Unknown Certificate: The certificate used to sign the response message is not recognized by the SAP system. This can happen if:
  
  The certificate is not installed in the SAP system.
  The certificate has expired or is no longer valid.
  The certificate chain is incomplete or not trusted.
  
  
  
  Configuration Issues: There may be issues with the configuration of the secure communication settings in the SAP system, such as incorrect settings for SSL/TLS.
  
  
  Changes in External Systems: If the external system (e.g., a bank or government agency) has updated their security certificates and the SAP system has not been updated accordingly, this error can occur.
  
  
  Solution:
  
  
  Install the Certificate:
  
  Obtain the correct certificate from the external system that is sending the signed response.
  Import the certificate into the SAP system's trust store. This can typically be done using transaction STRUST in SAP.
  Ensure that the certificate is valid and not expired.
  
  
  
  Check Certificate Chain:
  
  Ensure that the entire certificate chain is trusted. This includes any intermediate certificates that may be required.
  
  
  
  Update Configuration:
  
  Review the configuration settings for secure communication in the SAP system. Ensure that SSL/TLS settings are correctly configured.
  Check for any recent changes in the external system that may require updates in the SAP system.
  
  
  
  Testing:
  
  After making the necessary changes, test the communication again to ensure that the error is resolved.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to secure communication and certificate management for specific guidance.
  
  
  
  Related Information:
  
  Transaction STRUST: This transaction is used to manage SSL certificates in SAP. You can view, import, and manage certificates here.
  SAP Notes: Check for any relevant SAP Notes that may provide additional guidance or updates related to this error message.
  Security Policies: Ensure that your organization’s security policies regarding certificates and secure communication are being followed.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.