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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_UNRECOGNIZED_FIELD error appears during a transaction via Franfinance.

We invite you to check the following reason(s) to resolve the issue:

Transmitted keys not recognized for the FRANFINANCE key.

By default, the rules for fee application upon a 3xWEB or 4xWEB payment are defined in MID configuration.

However, the merchant has the possibility to enable or disable fee application via his or her payment form.

To do so, the vads_acquirer_transient_data field should be valued as follows:
  • To enable fee application upon a 3xWEB payment only:

  • To enable fee application upon a 4xWEB payment only:

  • To enable fee application upon a 3xWEB and a 4xWEB payment:

  • To disable fee application upon a 3xWEB and a 4xWEB payment:

  • To enable fee application upon 3xWEB payment and leave the default choice for the 4xWEB payment:

Make sure you send the FEES_3X and FEES_4X keys with the values "Y" or "N".