Description Mandatory parameter.

Allows to verify the integrity of the transmitted requests.

This value is calculated:

  • by the merchant website during the payment request,
  • by the payment gateway during the response.
Format ans 40
Error code 00 - signature Appears if the value of this field is incorrect,

70-empty params if the field is absent or empty.

Frequent errors:

  • The fields of the form have not been encoded in UTF-8.
  • Incorrect MODE (test or production) or CERTIFICATE.
  • Line break and/or carriage return are posted in the form.
  • Quotation marks ["] posted in the form.
  • The transmitted signature does not respect the rule of signature computation.
Category Technical details.