From the Dashboard, tap the User Settings icon, in the top right-hand corner of the screen, to open the Settings screen.
Under Agreements and Fleets, tap the tile labeled Fleets.
This will display a list of recipients in this fleet.
From the Fleets screen, tap the recipient name that you want to delete.
Tap Delete recipient at the bottom of the screen.
On the Delete recipient pop-up window, tap Delete to remove this recipient from your fleet.