> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://ixopay.ferndocs.com/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://ixopay.ferndocs.com/_mcp/server.

# Send Postback / Recalculate Fees

## Send Postback

Depending on the given Permissions, Users can re-send the last Postback Notification (e.g. in case the Callback URL was not available). This can be done by using the **Send Postback** Action Button in the Transaction Details or using the **Resend Postback** Button in the Outgoing Postback Request Log entry.

![Transaction Details](https://documentation.ixopay.com/manual/assets/ideal-img/transaction-details-buttons.131e552.1280.png)Transaction Details![Outgoing Postback Request](https://documentation.ixopay.com/manual/assets/ideal-img/outgoing-postback-request.1ed7abd.1280.png)Outgoing Postback Request![Postback sent](https://documentation.ixopay.com/manual/assets/ideal-img/postback-sent.493df28.1280.png)Postback sent

> **Tip**
>
> Don't forget to either send a `callbackUrl` in the Transaction Request or to configure a Merchant's notification URL for the Reconciliation Settings (Fallback).
>
> ![Merchant notification URL](https://documentation.ixopay.com/manual/assets/ideal-img/merchant-notification-url.6e8ba87.1280.png)Merchant notification URL

## Recalculate Fees

Depending on the given Permissions, Users can recalculate fees. This is particularly useful in case of changes to the [Fee Set Configuration](https://documentation.ixopay.com/manual/docs/connector/fee-management/set-up-fees) of the processing Connector.

![Recalculate fees confirmation](https://documentation.ixopay.com/manual/assets/ideal-img/recalculate-fees-confirmation.550b3d7.1002.png)Recalculate fees confirmation![Fees recalculated](https://documentation.ixopay.com/manual/assets/ideal-img/fees-recalculated.6d77695.1280.png)Fees recalculated