This has happened one time that we are aware of and the boat moved once confronted. So the first thing would be to politely ask them to move. The moorings are clearly marked reservation only so anyone moored without a reservation should know that they are in the wrong. However, this is a new program and not every captain will look at the mooring after tying up. If the boat refuses to move or if there is no one on the boat then we recommend notifying the establishment that collects moorings fees. At Cooper Island Beach Club and Anegada Reef Hotel I would call or go to the bar. At Leverick I would call into the dock and notify them that another boat is on your reserved mooring. These moorings are private property and the owners have the right to ask them to leave. We believe these two steps will address most issues.