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# Reimbursement attribution

> Use query parameters like source and user_id to track which customers get reimbursed through Truemed and how they discover you.

It's important for Truemed partners to know which customers are getting reimbursed, and how these customers are discovering Truemed. To this end, Truemed supports optional query parameters for attribution purposes.

## Source

Most of our merchants exclusively use the **source** query parameter. It is not technically required, but strongly recommended. The value should indicate where a customer clicked on your Truemed reimbursement link, so it should be different for each instance of the link.

### Common values

* `email_receipt`
* `email_payment_reminder`
* `order_confirm`
* `reactivate_campaign`

Example:

```text
https://app.truemed.com/qualify/[QUALIFICATION_ID]?source=yyyyyy
```

## User ID

For merchants who want more deterministic user-attribution, we accept an optional **user_id** query parameter.

### Common values

* The customer's email address
* The user's ID, UUID, or obfuscated ID
* The order or checkout ID

Example:

```text
https://app.truemed.com/qualify/[QUALIFICATION_ID]?source=yyyyyy&user_id=zzzzzzz
```

## SKU information

> **Note**
>
> Please reach out to [merchants@truemed.com](mailto:merchants@truemed.com) to enable this feature.

For merchants with a varied catalog, we offer the ability to tailor the telehealth survey to items purchased by appending the SKUs of the purchased items to the reimbursement URL via the **skus** query parameter. This looks as follows:

### Common values

* A single SKU
* A comma-separated list of SKUs

Example:

```text
https://app.truemed.com/qualify/[QUALIFICATION_ID]?skus=product123,product456,product789
```

## Notes

* Make sure any values used are url-encoded so that it's a valid query parameter.
* If provided, we will store the source and user_id and reflect it back in the Truemed dashboard and the .csv reports downloaded from the Truemed dashboard.
* For legacy purposes, we also accept the parameter names `utm` and `utm_source` and treat them as source values, but we only officially support `source` moving forward. We ignore any other UTM parameters.