Hi Boronia
I wouldn’t place any reliance on agents to check the condition of common property when tenants leave the building. Whilst agents are required to be rather meticulous in detailing the condition of leased property at the beginning of a tenancy I’ve never known them to be interested at all in the common property. The only way you can be assured that departing tenants don’t leave their junk on common property is vigilance by the other residents or management in the block. If no one bothers to complain then whole complex suffers.