When someone fills out a form with their email address, NationBuilder will automatically check that nation's database to see if it is connected to an existing record. If the person has logged in with their password, and goes to any additional forms, their basic contact information (phone number and address) will be auto-filled if it is already in the database.
Previously, forms would be auto-filled with basic contact information without having to be logged in, just if the email address matched an existing record in that nation's database. But based on customer feedback, we have removed that feature.
We have decided not to support the previous functionality, and we apologize if you were relying upon that.