In PRODUCTION mode, if your buyer gets an error message such as:
|An error occurred during the payment request, please make sure that the posted parameters match the ones specified in the documentation.|
It becomes impossible to make the payment and the transaction is definitively lost.
You will receive an e-mail notification containing the form that the gateway was unable to process and the value of the invalid field.
The FRANFINANCE_MISSING_AUTHENT_CHAIN_FOR_NO_FEES_OPTION error appears during a transaction via Franfinance.
We invite you to check the following reason(s) to resolve the issue:
|Authentication string missing for the "no fees” option.|
You have forced fee deactivation for a Franfinance payment via the vads_acquirer_transient_data field.
However, the corresponding authentication key is missing in the configuration of your Franfinance MID.
To resolve the issue: