Preventing fields from being stored in the submission database

Hi - I realise the question seems counterintuitive but bear with me a moment ...

I am creating a series of linked anonymous forms where the user has an option of entering a unique pass-phrase to indicate that each form in the series has been submitted by the same user without providing identifying information about the user.  I know how to do this part. 

I'd like to be able to provide the user with an initial form where they enter their unique pass-phrase and their email address and the pass-phrase is emailed to them via a notifier for later reference when they complete the forms. 

However, the challenge I'm having is that I want to send the pass-phrase via email but not record the email address or pass-phrase in the submission database - otherwise it somewhat defeats the anonymity :-)

Is there a way to ask for fields that you can use in an email notifier but don't get saved in the submission database? 

Thanks

Simon

Hi Simon,

You can use this app: http://auto-delete.jotform.io/

This will automatically delete the submissions you receive on the particular form. 

Let us know if you have further questions.

Regards!