Everything appears to be set up properly, I'm generating a hash on the back end, I'm calling the function after a form is filled, and I'm getting a response with content-type: image/gif.
My question is how can I tell from the marketo admin panel whether or not the leads are being associated successfully? I don't see any reference to any munchkins anywhere in my admin panel.
You may need to request the audit trail from Support.
Thanks - I've contacted support, but haven't heard back yet. I was hoping I was just missing where the info would be in the admin panel.
It's not in the Admin panel. It's in the Activity Log for the lead that you are associating (merging/creating).