> For the complete documentation index, see [llms.txt](https://docs.tarlanpayments.kz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tarlanpayments.kz/eng/acquiring/additional-parameters.md).

# Additional parameters

When interacting with the payment method, the additional\_data field is uploaded. Such field contains dynamic parameters of the merchant that will be saved in the payment system and provided to the merchant in webhook-e with the payment status and in the request of transaction status.

{% hint style="warning" %}
The additional\_data field is not involved in signature creating
{% endhint %}