Paperform allows individual respondents to Save and Return to forms. However, this feature is localized, which means there isn’t currently a feature to allow multiple people to complete one form submission.
A workaround that many of our customers use is to:
One challenge with this method is that the results of each section become fragmented, corresponding to each form, rather than joining together in your submissions data. Fortunately, an easy fix is to auto-send the results to Google Sheets to put them all in one place.