We have a fairly comprehensive article here about the things you need to do before leaving Dubai
http://www.expatwoman.com/dubai/monthly_home_interiors_making_a_graceful_exit_from_dubai_9055.aspx
HTH
A friend who had to leave suddenly due to medical issues is coming back for a few days to pack up their apartment and cancel everything. Im sure I remember a leaving checklist in a thread on EW but can't find it now. Did anyone keep a copy?
TIA