It seems that customers will always find a way to mess up with campaigns.
I don’t think you can force Marketo to create different leads with the same email address. That will go against all logic in the system.
Maybe you can do the following:
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Make sure that the email address in your form is not prefilled. People are lazy.
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Add a message at the top of the registration form asking people to use a different email for each registration. You can say that using the same email will replace the previous registration. Maybe tell that a unique confirmation number will be sent for each registration. Then you can either generate a random number in Excel (or the method below) and send an email to each. You might not require these numbers at the event but it might help.
Create a random registration number when the form is sent.You can take advantage that Marketo forms can capture data from cookies. You can create random numbers and save it in a cookie. Marketo then will grab the value from the cookie and place it in a hidden filed. Create a field in Marketo to save this data that then you can use in you emails
Ask your web developer to add a cookie to your landing page where the registration form is. Adding this code inside the <head> of your landing page will create a cookie with a 6 digit random number.
<script>document.cookie="event_registration="+Math.floor((Math.random() * 1000000) + 1);</script> |
Then you can update your form with a hidden field that will grab the value of the cookie. You can save the value in a Marketo field and use it in the auto-responder.
There is a chance that the random number repeats but for this purpose I would not be too concerned.