First, I"d ask for a copy of your lease, so you have an idea of what sort of closing fees you might need to take care of. Then :
To whom it may concern in management,
I, Secret agent/ninja Zirc, hereby give you (insert Landlord's name & appartment) that I will no longer be paying rent or residing in (insert appartment name) after (insert date). Please contact me if you need anymore information reguarding my termination of lease.
Things are different here...curious...what's "closing fees"?
Here it's a matter of submitting notice, doing an inspection and the landlord returning any damage deposit that was given in the first place....or agreeing to the cost of any "damages" over the course of the tenancy.
It varies from province to province, but that's about the gist of it.