Fills Out Form trigger...but isn't created by
Hi all,
I'm trying to find an elegant way to have a smart campaign be triggered off the activity that someone fills out a form, but only if it's a pre-existing lead. I'm setting up campaigns triggered when a new person fills out a form (using the Person is Created trigger with the Form Name constraint), and I'd like an equivalent program for people filling in a form who already exist in Marketo.
What's the neatest way of achieving this?