Richard, you'll need to remove the snippet of code in the Marketo form that begins with
"
<input type="hidden" name="_mkt_trk" value="id:033"Not sure how the behavior works in an iframe, but you'll likely also need to remove the cookie from the iframed Marketo landing page. The snippet should be on the landing page template, so you'd probably want to clone it first. Snippet should look similar to the one in the form.
Note that this is definitely a hack so please test
🙂