error 12

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.

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

The format of the field is incorrect.

The vads_language field defines the language of the payment page (ISO 639-1 standard). It must consist of alphabetic characters with a fixed length of 2 characters (a2).

Language ISO 639-1 standard
German de
English en
Chinese zh
Spanish es
French fr
Italian it
Japanese ja
Dutch nl
Polish pl
Portuguese pt
Russian ru
Swedish sv
Turkish tr

If the field has not been sent or is empty, the payment page will be shown in the language of the buyer’s browser.