Tenant sent me a certified letter cancelling lease

[Steven Legal]

Tenant sent me a certified letter cancelling our tenant at will lease agreement.  They gave me 30 days notice and told me that the property had been vacated. It had not been emptied of much of their property.  I left a phone message with the letter writer but got no response. A subsequent email, after the 30 day time limit, drew a response that the material would be removed asap. As yet no action has taken place.  What are my right as a landlord in this situation?  I find no documentation concerning property left behind when the tenant dissolves the lease agreement.