The Acquire from Contact is the FFL, Individual, or Organization that you received the Item from.
To add a Contact to an Acquisition
In the 'Acquired From' search box, enter the Contact name
Click the 'Search' button
Select the Contact from your list of Contacts or click the 'Create' button to create a new Contact
Review and update the Contact's details if necessary
Click the 'Save & Use This Contact' button
The Contact details will be listed in the 'Acquired From' panel
If you've made a mistake or selected the wrong contact, you can search for the contact again and update it or you can create a new contact entirely.