> ## Documentation Index
> Fetch the complete documentation index at: https://docs.m4psp.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Refunds

The refund of the paid invoice can be full or partial.

* In case of a full refund, you refund the successfully paid payment in full.
* In case of a partial refund - a part of the payment amount, for example, if you want to refund a part of the purchase.

After confirmation of the refund by the payment system, the M4  system [will send a notification](/callbacks) with details
of refund to the URL transferred in the request when creating the refund. A detailed description of the notification format
is described [here](/callbacks#refund-notification-example).

Please note that if you receive `result: false` in response in case of a synchronous response to a request, this means that
you need to analyse the error code in the `error_code` field (see [description of error codes](/errors-list)). If the `error code` is not fatal, then you need to wait for the [server notification](/callbacks). If the `error code` is fatal, then the refund transaction will not be created (it will either not be created at all if basic checks
have not passed, or it will be created with the immediate status `FAILED`). In this case, communication with our API is over.

If in case of a synchronous response to a request in the response you received `result: true`, this means that you need to check the status
of the refund transaction in the response body:
it can be final (`SUCCESS`, `FAILED`), and then communication with the API is over, or it can be `WAITING` — then
you have to wait for some time for a [server notification](/callbacks) from us with the final status.

> **Success:**
> Refunds are made in the currency of the paid invoice, under which the refund transaction is carried out.

> **Warning:**
> Check with the manager for available refund ways for specific payment methods.