If you've created a duplicate Client, or wish to remove a Client from your account, you'll first need to remove all of it's Matters.
Once all of the Matters have been removed, the Matters page will now show a notice at the top of the page:
Clicking "Expand" will open a dropdown that displays Clients that have not been linked to a Matter. From here, you can opt to either create a new Matter for the Client, or to delete it outright.
Deleting the Client will remove it from your LeanLaw account.