If you cannot find a borrower record for the person you want to loan to, you can create a Temporary Borrower.
On the Loans screen, click Create Temporary Borrower in the Actions menu.
The following screen appears:
Complete the fields, ensuring that you select the office where the user is located.
Click Save in the Actions menu.
You will be taken to the Loans screen and can then lend an item in the normal way.