Use CartHook to checkout on your site? Be sure to connect your Refersion account, this will ensure order information is sent to Refersion. Follow the steps below:
Add Refersion to CartHook
Login to your CartHook account. Once logged in, click on your name in the upper-right corner and click Integrations & Tracking
In the Refersion Affiliates box, enter your Refersion URL, Refersion Public Key, and Refersion Secret Key. Your Refersion Domain can be found in Refersion by going to Dashboard > Affiliate Signup. Your Refersion API keys can be found by logging in to your Refersion account and going to Account > Settings > Refersion API. The secret key will be hidden until you click Show (more info here).