Can you prevent a lead from completing a form more than once?

Hi @Sarah Lundy,

You an easily manipulate the follow-up page on a form. To do what you want, do the following :

1. Create your second thank you page and approve it.
2. Add a field in Marketo, called AlreadyFilledOut, type checkbox.
3. Create a smart campaign with the following characteristics (it's purpose is to mark leads who have already filled out)
   1. Trigger : fills out form (the form for the price)
   2. flow step : change data value, field : AlreadyFilledOut, New value : true
4. On the form, add the field AlreadyFilledOut, change it's type to Hidden and just change no other setting. It's value will be fetched from the database.
5. At the bottom of the "settings" step of the form creation, you can add choices to send people to various follow-up pages depending on the input values in the form. So click "add choice", and set it as follow : if AlreadyFilledOut = "true" -> Follow-up with the second page
   
6. Approve the form and the landing pages.
7. Test

Please note that this is not 100% bullet proof, as it depends on the presence of the cookie. If a lead erases it's cookie, uses private navigation or uses a different browser, they will get through it.

So at the end of the day, I would rather use an email confirmation that says to the lead "you have won a prize" and a smart campaign to send it, with a "run through the flow once" setting.

-Greg