Antom, leading provider of tailored payment solutionsAntom, leading provider of tailored payment solutions

INVALID_SIGNATURE

If the INVALID_SIGNATURE error code is returned when calling the API, you can troubleshoot the following scenarios:

After submitting the message, signature verification on the Antom side fails.

  • The signature content does not match the message
    • Line breaks and spaces in the message may be inconsistent with the signature content (e.g., between \r\n and \n).
    • Special characters escaping.
    • Timestamp mismatch: The timestamp within the message does not correspond to the one used in the signature content.
  • Public and private keys do not match
    • Confirm whether the keys used for signature and verification are correctly matched pairs.
  • The updated key does not take effect
    • If the gateway prompts that the signature verification failed when you use your updated key to add a signature, contact Antom Technical Support for assistance.

Antom returns the message, but signature verification fails.

  • Review your signature verification logic for potential errors.
  • Ensure the Antom public key is correct.
  • Check whether the signature verification message is the original text.

For more detailed information on troubleshooting signature issues, refer to the Integration guide.