# Pass custom parameter on URL and store onto order

This will only work for funnels built with the CheckoutChamp funnel builder

By default, CheckoutChamp tracks the moment a customer lands on a CheckoutChamp page and associates a sessionId to the purchasing session.\
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This tracking is done using our Import Click API call, which uses the requestUri and httpReferer values for tracking.\
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The httpReferer value is the URL that the customer came from before landing on the page they are currently on. This value contains UTM values for tracking - but it can also be used to pass/store a custom parameter to the order.

In order for CheckoutChamp to recognize that a custom parameter should be stored, the value in the URL must contain “cc\_custom\_\[valueName]=\[value]”

* (replace bracketed items with your own valueName and value)

Below is an example of an httpReferer value where CheckoutChamp stored the custom “fb\_ad\_id” value of 123456789

<https://secure.checkout.com/survey/1?cc_custom_fb_ad_id=123456789&utm_source=fb&utm_medium=cpc&utm_campaign=checkoutchamp>

Custom URL Parameters will send over to Shopify