This is really critical - not only is it difficult to test, and yes IP address filtering works, but I have third party pay-per-click sites that want to test their own conversion tracking and I can’t control them from testing that. I also often get duplicate submissions back to back that are truly only a single submission being counted twice. We also have companies trying to sell the use that might use a form to contact us, not a conversion we want to count either.
At the end of the day, I want to do landing page re-writes and test different things, but its hard if you can’t trust the data to know if you’ve made any improvements. Please move this up the development list.
Thanks!