The lead source of a form submit comes from the website visit in which the form was submitted. If Upsales did not register that visit, the form submit has no lead source.
A visit is not registered when:
- The visitor's browser blocks the visit. For instance, a common blocker would be if an AdBlocker prevents the visit, and then the source will not be visible to us.
- The page where the form is placed does not have the Upsales tracking script. Add the script to every page that has a form. See How to set up the website tracking script (including Google Tag Manager).