Residential lease agreement was begin on July 2010 and expired on June 2011, but the tenant lived there until June 2013, without a new lease agreement. After expiration date on July 2011, my tenant lived in my home month to month basis. Do you think my lease agreement is still valid to sue them in court? Can I still use the expired lease agreement and sue the tenant for unpaid rent and damages? Are the provisions of the lease agreement still enforceable? My tenant owes me about $20,000 for unpaid rent and damages. I can be reached at 510-619-8442. Thank you.