Devin Mylrea has written an excellent summary of a recent Court of Queen's Bench decision relating to priority over monies paid by the tenant and held by a landlord:
https://issuu.com/cbaalberta/docs/law_matters_spring_2016_final/18?e=11945774/35726413
Landlords should be careful to ensure that money held by the Landlord is clearly characterized as prepaid rent and not as a security deposit. Otherwise Landlords run the risk that secured parties will take priority over funds that would otherwise be used by landlords and applied against rent.