Archiving Contacts allows you to keep references to the Contact and maintain a history of what has been Acquired from or Disposed to them.
To Archive a Contact
From the Main Menu click 'Contacts'
Select the Contact from the Contacts List or Search for the Contact
In the Contact Information Panel check the checkbox next to where it says 'Archived'
Click the 'Save' button
To Un-Archive a contact follow these same steps and uncheck the 'Archived' checkbox before you save.