Is there a way to tell through which Web Form was the record created

I have a DocType (Registration Record) I have several web forms for this document type. Is it possible to tell through which web form was the record created for the Registration Record?

Maybe you can create a field “source” for the DocType, that is hidden in the web form, but has a different default value in each web form.

That’s a good suggestion, I tried it but the issue is that the user could still change the default value from the browser. I am unable to figure out how to do it from the server side.