need export registrant list to a new contact list

[ACMNortheast]

After a conference held in November we wanted to send out a feedback survey. We were not able to do so from the Event area, because we did not have the survey ready within 30 days of event closing. Exporting the registration list and adding each contact to a new list manually (to avoid duplicates) was time-consuming. If there is an easier way to do this, we did not have time to seek it out before launching the survey as soon as we wanted.

[NabilS0]

As we increasingly promote via social media, we are getting new contacts signing up for our events yet we have to manually cross reference each registrant to see whether or not they exist in our list of contacts. Would be nice if the system can flag registrants who are new and can create a way to add them to a list.