> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://be.betternow.org/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Set an external ID on fundraisers [BETA]

In some cases, you may want an easy way to assign your own ID to each fundraiser. This can, for example, allow you to:

* Match fundraisers with an event participant ID
* Match fundraisers with an external group or team ID

If you want to use the same ID for all fundraisers under a given project, you should consider using our [reference code](https://be.betternow.org/en/article/fundraiser-defaults-for-fundraisers-1agi4g7/#3-default-fundraiser-description) feature instead.

### How to set the ID on a fundraiser

The ID can be set using a URL parameter. For example: https://subdomain.yourdomain.org/create-fundraiser/choose-type?project_id=[project-slug]&external_id=[your-id] 

Please note: **URL parameters are not the most stable way to do this** (hence the "Beta" label), so you must understand that it may fail in some cases.

### How to retrieve the ID for each fundraiser

The parameter is called `external_id` in our [API](https://developers.betternow.org/). In the fundraiser API response, it is included as part of the `partner_data` object.

Alternatively, if you are on the **Premium Branded** plan, you can request a **custom report** that includes this parameter.