---
title: "Custom Format Templating Purge"
slug: "custom-format-templating-purge"
updated: 2025-09-15T09:20:23Z
published: 2025-09-15T09:20:23Z
canonical: "knowledge-base.rossum.ai/custom-format-templating-purge"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://knowledge-base.rossum.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Custom Format Templating Purge

Extensions like [Custom format templating](/help/docs/custom-format-templating) and [REST API export](/help/docs/rest-api-export) (and possibly others) store their API responses and artefacts in the annotation metadata. When re-exporting, we need to remove these old documents and responses to ensure a clean start. The purge extension helps us achieve this.

Additionally, this extension takes care of a cleanup when purging the original documents from Rossum (by default, all generated artifacts would stay in the system orphaned). Deleting such orphaned artifacts might be very important for **compliance reasons**.

## Installation

"Custom format templating purge" extension is provided and maintained by Rossum.ai in the form of webhook. To start using it, follow these steps:

1. Login to your Rossum account.
2. Navigate to **Extensions** → **My extensions**.
3. Click on **Create extension**.
4. Fill the following fields:
  1. Name: `Custom format templating purge`
  2. Trigger events: `Export` and document status `Changed` (!)
  3. Extension type: `Webhook`
  4. URL (see below)
5. In "Advanced settings" select **Token owner** (should have Admin access)
6. In the "Additional notification metadata" enable `Schemas`
7. Click **Create the webhook**.

## Webhook URL endpoints

| Environment | Webhook URL |
| --- | --- |
| EU1 Ireland | [https://elis.custom-format-templating-purge.rossum-ext.app/](https://elis.custom-format-templating-purge.rossum-ext.app/) |
| EU2 Frankfurt | [https://shared-eu2.custom-format-templating-purge.rossum-ext.app/](https://shared-eu2.custom-format-templating-purge.rossum-ext.app/) |
| US east coast | [https://us.custom-format-templating-purge.rossum-ext.app/](https://us.custom-format-templating-purge.rossum-ext.app/) |
| Japan Tokyo | [https://shared-jp.custom-format-templating-purge.rossum-ext.app/](https://shared-jp.custom-format-templating-purge.rossum-ext.app/) |

## Basic usage

No additional configuration is required. This extension should be run first in the extension chain.

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