Every contact has a history that shows
when their contact record was created
...
when the contact was added to (or removed from) each project and each state within that project
which user did each of those actions
which contact, if any, referred this contact to each project
...
Watch the walkthrough
https://www.loom.com/share/66c92ae7bebf49459a7745bd84adcee3
Steps to access a contact’s history
Access the Contact Profile Page of the contact whose history you want to see
Press the arrow within the History section to expand it
Scroll down to see the full history of movement for that contact
From here you can
Record which referral partner (contact) referred a contact to a project
See which contact referred this contact to each project
See which other contacts have been referred to projects by this contact
Change the date that
...
this contact was added to a project state
See when
...
this contact was added to a project state and by which user
See when
...
this contact was created
Press the arrow again to collapse the History section once you are finished